It was not obvious to me! I will do this. What kind of rate should i be shopping around for for a full inspection and more importantly what are the segments of the underside of vehicle i should be prioritizing getting feedback about?

The flex coupler did look to be good as far as i could see but since i already put a new one on former vehicle i can pull that one over when i pull it's turbo over as well. Thing is, i had installed that without knowing that the engine mounts were causing the engine to tilt a bit, so after getting the flex coupler on (wasn't easy) it withstood a couple months of use under a little bit of awkward weight in one direction. It was only around 1/8" of pull to the side that the pipes misaligned by, but perhaps it's worth getting a new flex coupler just to get a truly fresh start there. I also put the engine through a long phase of bouncing around due to mounts going worse and worse until i replaced them.

And yes it spun freely. It is supposedly fully refurb'd and looked good as brand new when i got it. I'm planning to go through and double check everything on it though, looking for too much play in impeller.