Thank you so much for confirming this. I'm terrified to over tighten that screw, even though the parts are not that difficult to obtain. Even went through the manual for my Vajra to see if it was different, most definitely is.. lol.
I've wanted this car since the early 90s.. so I've taken great care with its assembly. I've tightened it 1/4 at a time and it is definitely getting better. Now I just need to figure out how to get paint into the high sides of the wing, I really don't want to botch this bad boy up. Concerning the 10.5, very good friend of mine is a total Tamiya Nut. He suggested the 10.5 and even said leave the punch level at 1, and stick to a spec type system.