MM is way too hot! Why?

[glassdoctor]

Does it ever cog on startup? If it cogs bad even once and you pull much throttle, that can get it hot.

Try running it outside where it can run free and see what happens.

EDIT: ok.. I see you have the 1.5d not the 1.5y.... (please list the kv)

That may be the problem. You need to gear it down to about 10/46. 3200kv is a very hot motor so you are overgeared pretty bad right now for anything but speed runs.