Maybe you already know, but too much weight reduction harms the cowl in the term of stamina/cowl strength. It becomes much more fragile. The new cowl looks like a rollcage now. Honestly I've been doing this in Mini 4WD Hyper Dash Grand Prix. My main cowls are Beat Magnum (standard and chrome blue) and Cyclone Magnum 40th Anniversary Special. I do not understand Japanese language, but slowly I figure out what menu does what. According to that, I assume you have done *7 star level modification, hahaha... "It looks very unreliable." You're, sorry to say, very correct. One blow from another machine could have destroyed it. It is a pure racing machine now and you have to take care of it very carefully.