Hasty post and mod, but Stainless S7 with LHP73B and the new 17mm 3v20A driver

Gets hot stupidly fast and I had to figure out if I even have an 18650 that can handle the current. Kind of nuts to think that like a year ago or so the M21B was impressive for having that output and now here it is in a pocketable light that really doesn't like or want to be doing that. Got no idea what that driver should even go in, the C8 maybe??