i've done it with a set od bbs rx 2's. They can be a real b1tch to seperate especially if you round the heads off. If this happens, you are pretty much f**ked ! The threads will usually not shift, and they have to be re-drilled out by and engineer and re-threaded as the bolts are made from very tough metal. You will also need a new set of bbs bolts which are expensive !
Buy a set that don't look corroded !!
An 8mm spline bit is needed and a torque bar. Not for the faint hearted.