RE: cheap can motors
This wont answer your question, but it is an alternate motor that I have run with success.
In my GWS 350D set up I ran the Orion Baja motor, its an upgrade motor for a team Losi Mini T truck. I got mine for about $40.00. It has replaceable brushes, and has bearings. I have ran mine very hard on 3S for approx 3.5 hrs of flt time. The brushs are worn about 50% now. The only problem I have had is a brush pig tail hung up in the brush holder and did not let the brush travel in with wear. I corrected that and continued to run the motor. I have been flying foamys up to 12.5 oz with the D gear box running Kokam 1200, TP 1320, 10x4.7, 11x4.7, and 12x6 props. It works good.
When I elected to get the better brushed motor, that was the extent of my funds, and I already had a brushed controller.
I must admit that I just got my Himax 2015-4100, CC25 setup to replace this motor.