I would not recommend such a procedure. The bayonets of various items (lenses, TCs, cameras) have different thickness. You might end up with a mount that prevents infinity focus or doesn't fit properly.
The grinding off approach is quick and easy and only takes a few minutes provided you have good screw drivers and a suitable metal file. Do watch out for small springs on the inside of the bayonet, though and do the mount removal so sundry items won't fly away.
