[Swiss]

I was looking at completing this mod, but wanted to ask some questions. I appologise if someone has asked them before.

1. Tapping a M3 to M4. so do you first redrill the hole, then use the starter M4 Tap, the the finishing M4 tap? Or can you just go straight in the with the starter M4 Tap?
2. Are people re-tapping the front and back holes of the front gearbox?
3. Do you need a cutting fluid of some kind?

Thanks

Paul