4.3 mm holes, 20 mm deep

[Chaz]

Ok, pushed up the VFD power a bit, it doesnt seem to like this but has worked.

I used a 4mm drillbit for the 4.x mm holes and the bolts fit well, no need for the slight oversize IMHO. Redid the failed 5mm holes, done.

12500 rpm, 0.25 depth, full retract, 500mm/min plunge.

I did have a problem with Thor which cost me about 2 hours, the bearing nut came loose and caused problems. I had heard something but didnt investigate it earlier, no damage done, phew.