Not familiar with push kits... but do their turbos have coolant lines? Some early BD kits (2008/2009) had damaged bearings because BD didn't think it was necessary to run coolant through the turbo... then it became part of the kit for 2010. Some got along fine & some didn't.
When I was chasing an issue a while back, BD suggested I hook up my oil pump to a 12v source -- for lube & make sure it pumps
-- then spool the turbo up with an air gun to make sure the bearing was ok. If i remember right, they wanted to have it free spool for something like 5+ seconds after you removed the air flow from the intake side. I imagine you could accomplish the same thing just by idling your sled with the intake cage & prefilter off (don't let anything get in there) and see how long it takes to spool down after you shut the engine off.
Just my thoughts.... maybe doesn't apply to a push kit turbo like my 2860.
One thing I didn't see mentioned in the my quick read over this thread was checking the throttle body rubber boots for cracks... but you probably did that when you changed reeds.
good luck! --Matt