Just remember: when trying somebody's rig (or any used bow)............it may not be set up the best.

That can really make a good bow feel/shoot bad.

IMHO, customs tend to be better than factory rigs, but the "just as gooders" will claim otherwise.
Problem is, one has to shoot a few, for a while, to see what their preferences are.

So a custom right off the bat, might not be the best choice.