I shoot the WB also on a Trykon XT.The only vanes that I have had come of were because of medoing a poor job cleaning shaftbefore fletching them.Check centershot for sure.Also check the diameter of your shafts to the inside diameter of the biscuit.You should be able to see light between top of shaft and biscuit.If biscuit is to tight it will strip your vanes off in about 20 shots or less.They sell differentbiscuits for different shaft diameters.Your friend probably just used a little more glue or something like that.Always put a small drop of glue on front and rear of vane.