Nice mod! Love that U3 2C - so they are out of stock now? How recent did they have them? Sounds like a pretty awesome bump, but probably expected, coming from a XML T6 on a stock alum MCPCB I assume?
It sure is a decent light - great deal at the GB price.
Found my mod details here in post #214, and then post #223: https://budgetlightforum.com/t/-/26433.