hi i was reading the thread a few weeks ago about holes size for drilling for proclass.
at the time i was half way through doing this,
brought a very ruff set of wheels brought for 65, polished the hubs.
sanded down rims and dan powered them, new spokes and hay pressdoo.
i used a 3mm - 5mm - 8mm then finaly a 11mm dril bit,
think they came out nice, and proclass are making silly money now.
hope you like.