The dryer was "inherited" when we bought the house. Instead of buying a new one for lots of $$$, I decided to spend much less and fix the dryer myself. So I bought all the rollers, belt tensioner pulley, drum bearings, belt, and new felt seals for the front and back of the tumbler. I bought the glue for the felt but ended up not needing it.
I rolled the dryer into the garage on a Saturday morning and had it field stripped to the cabinet in less than 30 minutes (Thanks AppliancePartsPros Videos!). Note: When in doubt take pictures BEFORE you take something apart!
Sure enough, all of the components I bought were badly needed, and all of the dryer ductwork was 50% or more plugged with lint. Cleaning it all out, including removing the heater assembly to clean out the heater duct took most of the time. Putting it all back together was easy after I made a makeshift workbench with plywood and sawhorses to work from. I installed the roller components and felt seals on the workbench - much easier! After cleaning up the caked-on lint and installing new parts, it took about an hour to completely reassemble and button up the cabinet. Took it back inside, hooked it back up, and dried a load of clothes. It runs and sounds like a brand new dryer and dries the clothes in probably half the time it used to! 200 bucks worth of parts and some manual labor isn't a bad deal for a new dryer!!