Drilling the hole was no problem, but creating this spacing hole underneath sure was. Turns out that the drill NEarlY missed the large M12 nut of the old bar. It drilled a hole trough the metal plate keeping the nut in the hole. Lucky. Anyways, it took lots of drilling and dremelling to get this large countersink. Needs to be wide for a tube-wrench to fit in there. The new bar is M10, but stornger, AISI 316 and all. thinking of simply putting a cap on this. You never know, we might break the AISI bar as well and I would not like to drill a third hole. So…