Replaced Thrunite Cat6 V2 reflector with TIR Optic.
The inspiration for this mod was the result of seeing user reviews of the Manker MK37 and U22III lights with large TIR optics. I was able to find a similar looking optic on AE.
The Thrunite Cat6 V2 reflector cavity/dimensions (~ 52x29 mm) worked well for this optic, which measures 47mm dia x 29mm ht. The hardest part of this mod (or any mod where reflector or optics are involved) was getting it properly centered and focused.
Optic (slightly lowered to help focus) with DIY spacer/centering ring.
FWIW in the screen captures (see below) from BLF member andreas0401’s video review of the Manker U22 III one can see the result of this optic vs a traditional reflector, in that case using the SBT90.2 emitter. I get analogous results with the Cat6 and XHP35.
White-wall shot showing traditional reflector hotspot from U21 vs the new optic in Cat6
Screen capture from andreas0401 video illustrating this optic in the field, broader hotspot w/less defined spill (NOT the Cat6 in photos)
Unlike most mods the result was not more OTF light, just less as spill.
edited with different photos