I was thinking of purchasing one of these and I wanted to see if anyone has used one in the past or is currently using one so that I could get a little feedback on them. I know that theyre priced high, but it prevents me from ever having to buy a tranny temp. guage, installing a manual switch, and worrying if and when the tranny is getting hot. More than likely Im going to get a tranny temp. guage to be on the safe side, but it also allows me to mount it pretty much anywhere. I know that theyre expensive, but theres lots of benefits from having one IMO. I know that I could build one for less, but I want something thats pre-assembled. I certainly dont want to rig anything up and cause a hazard for myself. Anyhow, more than likely I will be purchasing one, but I didnt know if I should get the smaller one or the bigger one. The smaller one has a 7" fan and the bigger one has a 9 1/2" fan. Demensions: 13 1/2" long x 9" high x 3 1/2" thick. 10 1/2" long x 6 1/2" high x 4" thick. Let me know what you guys/gals think I should do. Thanks