Hi Ouchyfoot,
If you’re considering the Torchlite build, you can see how the IOS 5a driver performs with the MT-G2 and XM-L2 in that host. I have some beam shots here. NOW 70% OFF COUPON!! DIY TorchLite 2x26650 XM-L, SST-90, SST-50 etc Host!
This is the 5a driver I used from IOS http://www.intl-outdoor.com/boostbuck-318v-triple-xml-circuit-board-p-542.html