Another E-XT8

Just want to share with you my coverted XT8 and ask few Q's (thanks for this forum I made the conversion)
My setup - Monster motor mount
- EZRUN 80A combo w/2350KV motor
- 11T mode 1 gear
- 5000mAh 20c zippys.

I'm already runing this setup for more then a month on the track. The truck is handling very good and its very relaible to me so far, the speed and power are good and I don't need more then that.

I do have few issues that I need to address:
- Zippys are too warm at the end of each session, I will probably switch to 25C or even 30C zippys, please advise if 25C is enough.

- Motor is hot too, around 150F at the end of 20min session and two fans attached to it. Its very hot right now in our area, ~95F at noon. Any recommendation for a better motor that runs cooler with the 80A EZRUN ESC?

- The pinion gear it getting loose, I'm using med tread lock but its still not enough, any other tips to keep it in place?

Here is my E-XT8 on our local track:
http://www.youtube.com/watch?v=d4-Sq4sUMq0