I already have a ACS, but it isnt welded, it ALLWAYS comes loose!!!
I would rather buy a one than welding it myself, and i havnt got enough for a eno, other wise i'd buy one (Y) :)
Oh and mine keeps skipping aswell :P
And iv tryed loctiting it, but it keeps coming loose the very next ride :P :P
Hmmm i dont think they would grind the removal tabs off, cause they you wouldnt be able to take it off :D