Not had "that" many problems with the wing mounts, it really is the "odd" one that has a problem (110 X6 Squared kits now sold in the UK and only 3 problems that we have been informed about so far).
As for breaking or pulliung the screws out, then maybe just use some slighlty longer ones, I have doen this to my own X6 and not broken one at all since.
The worst problem we DO have is when Chazz puts two from the same side in the pack or a kit!!!!
