If you're wanting to know how much current you are drawing and peak voltage I sugges that you visit this site

www.rc-cars-planes.com

I have one for my electric planes and found that it has been invaluable for knowing current draw and setup for different gear ratios and props (pinion/ spur equiv) and ensuring that I am not overdrawing on my lipos.

I don't think you need you need to worry about any safetyissues about your controller/setup.. Beacause you are running a safe setup. I will talk to my friend tomorrow, asking him about those diodes. Funny thing; when i mentioned this to schulze, all of a sudden the language barrier was too big to discuss anything like this.... How odd..

Now that I've had a chance to give this new setup some good runs I've noticed a interesting heat issue. After a hard run, the motor can is just warm to the touch, never really hot, but if you touch the end of the armature where it sticks out of the bearing in the back, it's so hot you can't touch it for > 2 seconds.

Should this concern me? It's geared 72/20 right now.

how fast is it?

Sounds pretty hot. Some of this heat is likely from the magnet, as well as a small amount of heat from the pinion/spur mesh. Have you installed a fan? It si difficult to get an accurate temp reading on the shaft itself, but keeping the can as cool as possible will help keep the shaft cooler as well. Not a huge concern, but cooler is always better.

It's geared for torque and runtime, not speed. With my current gearing of 72/20 and 6" tires it runs around 35mph.

I do have a fan on it as seen in my pic further up the thread. I just ordered some smaller pinions and will gear a little less since I sure as heck can't control it at 35mph anyway.

You have nothing to worry about. No need to gear down, either.