DuoMax has this function, or it doesn't?

Highly doubt it has calf rollers

I’ve heard the medical break through 7 open foot has it. This one does to.

Daiwa 4d Supreme Hybrid Daiwa's FORCE Option they display, but don't say much about in their manual FORCE: an influence (as a push or pull) that tends to produce a change in the speed or direction of motion of something By the above definition I fully expected Gentle to be 3d turned off, Soothing, varying from 0-3, and Vigorous from 0-5. That would make sense. REALITY: My interpretation of Daiwa's definition of FORCE is the number of times a 3d level 5 intensity occurs from start to finish of an auto program. EXAMPLE: Using the "Refresh" Auto Program for 10 minutes, aided by self produced videos, Gentle Force, Level 5 occurred 22 times. On Vigorous, level 5 occurred around 30 times. BOTTOM LINE:: There will NOT be a noticeable difference from a FORCE setting of Gentle, Soothing, or Vigorous. That is basically what Daiwa's response was to me when I questioned and sent them videos of all the modes under the same conditions. I thought the chair wasn't working correctly. Healthy back, no issues, this is a GREAT chair. From a standing position, if you are able to bend backwards between 30 and 45 degrees without pain or discomfort, most likely you will be good with this chair, otherwise, don't buy the chair. Try a Luraco I7 or I7 Plus (I Own). NOT the Luraco I9 (I've tried), similar bending/arching issues. My wife has lower back issues -- degenerative disc. We made the mistake of assuming FORCE was a 3d intensity level. In that mind set we thought she would be able to use the chair on the Gentle setting and I could still get my desired deep tissue massage. Unfortunately, not the case, RE-EMPHASIZING; Gentle reaches level 5 multiple times. Very painful for her. She can only use the manual mode "Point" and "Partial" massage with the 3d level OFF for lower back, plus "Neck and Shoulder", "Sweet Dreams" and "Refreshing Nap". Depending on massage location she can get up to a level 2 and with the traps and neck a 5. Using manual mode for her is a real hassle due to multiple changes required to massage her back. That's why the I7 is a much better choice for her. 3d levels are programmable by sections - Low back, mid back, neck, plus you can store all settings in one memory for fast and easy recall. I have no back issues and love the chair. The back pads allow you to manually manipulate how intense you want the roller pressure points. With No pads, intense roller pressure points, 1 pad, pressure points a little less intense. .....ect. NOT USING ANY PADS: If you are 5'7" or shorter, you can use a "Car Front Seat Cover Half Surround PU Leather Pad Mat" (around $11 ebay) for neck and head support. You can also use the included 6 section pad if you want to bring your head a little more forward, beyond that of using the seat cover. Place the edge of the pad around your mid neck area. LOWER Rollers: In this area use two or more 7x9 Pot holders to ease the byte of the rollers. BODY SCAN Adjustment:: No info in the manual on this The chair has a manual adjustment option which shows up right after the initial Body Scan. Up and down arrows appear. At this point you can adjust the baseline roller position by tapping the arrows. You will notice each time the arrow is tapped, a 7 second timer appears. You have 7 seconds to decide if the rollers are in the correct position for you, if not, keep hitting the arrows until you are satisfied. Let the timer elapse, and the massage begins. TIMER TRICK: If you are at the end of a massage and you want to continue the massage without the chair resetting: Before the massage time expires, simply select another massage, then select the massage you desire, The timer will reset.OR you can open "Adjustments", select a different time then select your desired time. This also resets the timer to the desired time. As far as I can tell you can do this as many times as you want. ZERO GRAVITY: Most auto programs do not use "Zero Gravity" for their standard massaging position. If you would like to use "Zero Gravity" as a massage position for an auto program, open "Adjustments" and select a "Zero Gravity" position. The chair will change and stay in that position until the conclusion of the auto program. This works on most of the auto programs. SHORT People: My wife is 5'3" this is the only chair we found that fits her. Example: She can feel the foot rollers on the Daiwa (the whole ottoman slides up), on the I7, she can barely feel the rollers. Fit was a big factor for the Daiwa purchase. She tried multiple chairs but none fit her correctly, there was always something not right. The above information was learned after we received the chair. Not enough time in the showroom to recognize the FORCE issue. On a personal note: SCIATICA: The last couple of days I've been cleaning my tile and grout, a great deal of bending in positions I'm not used to. As a result my sciatica started acting badly, to the point of making it difficult to even sit comfortably. I did a 30 min round of the Hybriflex program and the sciatica problem went away. I was hoping it would help, never dreamed it would go away completely. It worked for me, hopefully, it will work for others with an irritated sciatic nerve as well. SAFETY - Proximity Sensors: I didn't see this in the manuals. The chair has proximity sensors located on each side of the chair. They are positioned in the divide section ( 2-3inch silver separator) between the upper and lower side chair sections. To test the sensors, place your hand on or near the separator section after initiating a massage. The chair will start dinging. Take your hand off, and it stops. Try this when the chair is changing positions, the chair will stop, then resume once you remove your hand. The Supreme is a hard chair to beat. I fall asleep in the Supreme easier than my i7 Plus. When I wake in the Supreme, I feel like I'm trying to wake from anesthesia. Most of the time(90%+), I start another massage and go back to sleep. The most 30 minutes programs in one night, 4, so far. I couldn't wake up enough to get out of it. 4/5 stars: FORCE is misleading You really only have 12 noticeably different auto programs not 36 as indicated on some youtube videos.

@@user-kx4dj5ee3o Thank you for the thorough reply and review. Best info I've found yet on quirks of this chair. Currently looking between the Supreme Hybrid, Luraco i9 Max Special Ed, and Infinity Luminary.