I've been Googling and Googling and not finding much specific to the GX470. Are there any upgrades people are doing for superior cooling? Looks like the stock fan is an electric fan. Maybe an upgraded fan? Flex-A-Lite or something? Looking to move more air at lower speeds in this crazy Florida heat. I did find some people upgrade their 4 Runner with the GX fan so that must mean it isn't total trash.. But I'm looking to see if there's anything even better/stronger.