Thanks Randy!
I was thinking that was the case.. I really like my Tekin gen2 17.5 but I can't get the speed and tempatures to work out in the B5M. Im Thinking the Reedy's larger holes on the can let it run cooler in the MM. Tried venting the body but I am pushing 170 or a little over temping the can after five minutes. I played it safe on gearing and timing as well, safe enough i was under powered compared to the rest. Rear motor it will run all day with no heat issue, and I have the speed to run with the rest. Bigger vents on the can I think is what the Tekin may need. The gearing I was using was 69/31 under 20 degrees of timing in the motor, blinky mode.