Get the Convoy C8 host. I can tell you how smooth is the thread and how good is the anodization but just get this host. But as you know the pill use 16mm star and 17mm driver. Finding another C8 pill is not garanteed to fit the convoy C8.
Noctigon can be a good alternative to sinkpad.
For the driver, I would highly recommend drjones drivers
There is also a polish driver, that not only use custom firmware but modded the 105c itself.
Do not stick to xm-l2 u2 1c, U2 bin is the most powerfull but 1c tint is really cool white, try another tint on a non moded light. T6-4C is popular around here, very neutral white. I received a flashlight said to be T6-4C but it was really more warm tint than my other T6-4C but in the end I like it.
You can’t know unless you try it.