Best hydraulic flat tappet lifter?

moper said

I've used Comp almost exclusively. Some Engle. Some Crane, I buy the lifters with a cam. Never had a single failure or noise. Including 4 sets of Comps last year in various displacements. Most lifter issues are not the lifters. Might be the process, the install, the block itself... Rarely the lifters. Simple fact there.

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Since we had a new Crane lifter gradually go flat and replaced it and all is then good, do you think it is more likely due to some speck of dirt in the lifter....or ?? (BTW, no problem with the lifter bores in that block...it was virgin.) Trying to figure out what you are doing right and others doing wrong, if indeed the lifters are fine. We keep our stuff pretty clean during assembly.