I didn't know if the problem was the blower wheel or a stodgy roller so I bought both kits from AppliancePartsPros.com. The video for the blower fan removal was more detailed, so used that as my guide, both for disassembly and rebuilding. Took me about 3 hours to do the work. The blower wheel was covered in lint but structurally fine, so took that off and fully cleaned it. Two rollers were kind of sluggish so replaced all 4, the idler pulley, and a new belt. Gave the dryer body full vacuuming and reassembled it. The dryer now seems better, fingers crossed. Planning to return the blower wheel to APP.
The only issue -- and tip for those coming next -- is that the videos don't identify which length of screws go back into which parts during reassembly. Almost all of the screws require a 1/4" nut driver, but they are different lengths. So details when reassembling like "use the shortest 1/4" screws for this panel" or "use the longest 1/4" screws to reattach the bulkhead" would be appreciated. Screws are back in my dryer rather haphazardly, probably wont make a difference, but we'll see. Onto the next project . .