I'm having a hard time getting the nipples off the spokes on my 90 Mountain. My problem is the spoke wrench. I've done several Hondas and had no problem, but the nipples on this bike have me stumped. I have one of those multi-wrenches, 1 thru 6 and it's fit all my other bikes. These seem to fall between the 5 and 6. I measured them, flat side to flat side and they are very close to 4.50 mm. Went out this morning and finally found a 4.4 wrench at a bicycle shope. It fits nicely on one set of surfaces but won't go on the other sides. The nipples seem very soft and pretty thin. One of my idiosynchrocies is trying to reuse as many original parts as possible. I've gotten pretty adept at cleaning, polishing and replating (Eastwood tin/zink kit) spokes but nipples are a one time try. Haven't found any posts about this problem so am wondering if maybe a previous owner changed rims or spokes. Any help greatly appreciated.