I received a few comments from someone who decided to test out these Nichibo -3240 motors that Zinky86 on ebay was "able to get in" (http://www.ebay.com/itm/121624679840)...
Well, that's conclusive. 2 separate reports. I have not received that set from meishel to test but no need now.
I don't know what it is about the FK180SH-3240 that makes it so attractive for lowballers to slam metal brushes in! Hell, even the China clone variety FK motors have proper carbon brushes, and seriously, if you look at a 3240 armature and think "That will work with metal brushes for more than 5 minutes" you're an idiot, there is NO way that can have a legitimate purpose.
What's more is that the designation "FK" is a LIE. "K" specifies carbon brushes. It's very unambiguous, go look at the Mabuchi website. To put "FK" on a metal brush motor is misrepresenting the product. Same with Kysan Electronics - the Draugr team checked already and until we asked specifically they had the damn thing labeled as an FK with not a peep about metal brushes, and the specs were ripped from Mabuchi's datasheet on the real motor.
This is what Zinky86 had to say about the Nichibo -3240 motor:
And Nichibo, what the fuck?