While Ive never tried the tapered bearing hubs, the only way I could get much longevity out of front hub bearings was to put a sleeve between them. A piece of 3/4 .058 wall tube works quite well, then when you tighten the castle nut up, it doesn't pull the inner races together. And when tightening the castle nuts, as with any other wheel nut, they do not get "tightened!" Simply snug. I have always ran my castle nuts finger tight. Never lost one with the lock pins run through a castle nut either.