Clothes Dryer repair?

OK, the motor seems to be a brushless design as its just a skeleton frame and a bunch of windings. I filed the points and ohm'd out the winding and its toast. So I start looking for a motor, EZ enough to replace, pull the motor, unscrew the cage blower off the axle and replace motor, yadda yadda. WELL, it turns out the F'n blower is a plastic impeller formed on an aluminum threaded center thats screwed onto the shaft in a L hand thread. 7/8 socket should unscrew the impeller off a supported axle...ON HELL! the plastic just deforms and turns into a rounded nub. Upon further investigation, the impeller is captive held in a duct that is thermoset together so you cant get the friggin thing out anyway to hold with anything to unscrew it. So I said "F this" and took a roto-zip and cut the impeller off the shaft. all that was left was the plastic/AL center on the shaft and I was able to wiggle the duct off (that I drilled out the spot welds on to seperate...its a $96 dollar assembly in addition to the as high as $481 replacement motor from the dealer) so now I can grab that SOB with a pipe wrench and unscrew it...no dice! The plastic ended up seperating from the AL threaded center, even better I thought! Now Im grasping the knurled threaded insert with vice grips and trying to unscrew the thing (Righty-loosey in this case) Nope, that thing ended up turning the pulley on the other side that was chucked in the bench vice. I was not defeated: I took a grinder and ground down 2 opposite sides of the threaded insert and split it in half, sure enough it was L hand threaded as I thought but it was on so tight that it just wouldnt move with my setup. After all that, I find the impeller is not sold seperately any more and the only used one on Ebay was sold back in july. I slapped the thing back together and traded it in on a used Whirlpool for $160 delivered and installed. 90 day warranty and it cant be any harder to fix than this POS, planned obsolescence?