Just got back from a test run with my new gearbox and it worked great! I didn't want to spend $70 on a box I would scuff up right away so I went with the Integy Evolution and I'm pretty happy with it. My normal running temp is around 170* and after installing the box and hitting it hard my temp was 110* It is cooler today but I'm sure it would still drop by a nice amount on a hot day. If anyone is having temp issues, get an aluminum gearbox!
The harder I bash, the more I can upgrade.