Re: Thoughts on this machine work....
Doesn't look good. If it is not where the bearing rides it shouldn't affect oil pressure. I would be worried about strength. An imperfection like that could be a starting point for a crack.
Re: Forge actuator opening rates
There's more factors to consider. Exhaust pressure pushing against the puck, differential pressure before and after the throttle body, amount of heat soak the preload spring can absorb before it looses tension, type of boost controller (manual or electronic)...
Re: Anyone run stock wastegate and boost control setup no muf/cat?
Removing the cat with a stock turbo / waste gate WILL cause boost spikes and creep. The first time it shifts into second at WOT don't be surprised when you see 25 psi or more and your engine goes pop.
Try Sportmachines' Forge...
Re: first time buyer
Find a member near you to help check it out if possible. You should also find parts needed that you know about and get prices. Cladding is EXPENSIVE. Sportmachines usually has anything you could need for these trucks.