Thatnks guys! I would dremel the screws down, but it turns out I don't have enough anyway. Superbasher, it depends completely on what you want done...so you're best off contacting him yourself really. The address is
www.fulloption.co.uk, and his email should be on there somewhere. :)
I think I've actually found a pack that will finally fit, though I can' really post it on here as it's not available on RC-M. It's a 4000mah 6S2P 25-35C pack, that's built in such a way that it'll fit in the square space on the chassis perfectly (I'd go for a higher rated pack if there were any that fitted without overhanging the chassis). I know that it's on the border of what's required for the 1515 1Y, but the Havoc is RWD...thus taking away some motor strain. Any thoughts would be welcome, though...