Pulled it all apart and cleaned/measure the shaft. About .0025 variation in some areas, found a few high spots I filed down. Degreased with Acetone and 're installed the taperlock with Loctite 680. Couldn't find 603 but I think the 680 is a good choice. Seated the taper then tightened set screws and repeated, hopefully it works. I appreciate everyone's input, post a few pics tonight