Wow - must have taken you ages to do by hand!
I got in a OP version of the 86mm reflector, & trimmed it down just last weekend, & I was thinking “there’s no way I would be filing this down by hand”.
I put the OP reflector into the L3 I modded a while back, & swapped out the XPL with an XHP 50. Turned out really well.
Are you planning to use XP-G2 in your Courui?