Something isn't right..

Makes me wonder if people are not removing the inner springs or using a lighter spring / pressure for brake in... I know for my 2 year old Comp 285XL (that’s not a 4 speed friendly cam) the guy I had build it handed me a box with the inner springs when I picked up the motor. The cam my buddy lost last summer, he was being lazy and did not want to pull the springs....
I seem to have busted that mith with both of the cams that I broke-in in my own motor... Or as you may say I got lucky.. I'm highly suspect of these four or five year old $400 eBay heads with a sticky valve or something... Again these are my customers I can only lead them to water I can't make them drink..
Not this customer in particular but other customers I have I watch them spend three times as much money to save or I should say try and save money....