...used 3"x 1/2nft bolts from a set of moser axles with lock washers under bolt heads and back side of axle flange. /QUOTE]
That's the problem, the bolt heads are much thicker than press in studs. I think I would give Moser a call and see if they have any suggestions. There is not a lot of room between the backside of the axle flange with press-in studs, I've never measured it but I bet it's not much more than a 1/4".