4L80E Dual feed mod and transmission assembly / Dodge challenger LS Swap

I do a dual feed mod on a 4L80E and assemble the rest of the transmission, and sorry i had lost video on the rest of the transmission except for the timelapse parts, but I still tried to explain what I did on the rest of the trans assembly.
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[@sempergumby8734]

Great video. Question when doing duel feed Mod. Does a particular checkball have to removed? I was told #9 to remove