I think you can only feel if the bearings are right, if tou take the fork legs off, at least the wheel out. The 32 mm isn't special, it's supposed the the top clamp is gone when adjusting, then there is room for a normal tool.
This what you do on feeling, if there is no play at the moment it's right. If not then adjust it until it feels not free frotating, and then slightly back.