About the durability - i have done around 1000km on M500 with M600 controller (1.1kW peak) and everything was perfectly fine till i crashed last month and then damaged nylon gear and mid-gear with clutch (and got spare set from Czech).
In my opinion the 'new m500 gear' is fairy tale, because it would require also a new stator to match. I never heard and never saw a new M500 stator, and my M500 is rather from the mid-end of M500 production, not from the beginning.
In my opinion the 'new m500 gear' is fairy tale, because it would require also a new stator to match. I never heard and never saw a new M500 stator, and my M500 is rather from the mid-end of M500 production, not from the beginning.