FW3A mods on a budget:
GITD: trimmed tape band along inside wall just below Carclo optic, and band along groove in tail cap
Optic: 10507 (in addition to others , beams)
Grip: trimmed bicycle inner tube, reversed. Also, o-ring attached, aligned to base of tail cap.
Still have a plan to install trits, but waiting to see how the tail cap aftermarket offerings pan out. I’m completely satisfied with the XP-L 3D emitters and feel no need to change. I was tempted to attach a metal washer to the tail cap as done by another member here to help minimize accidental activation, but, I’m finding the slight twist of the head to be very effective and not really a bother. The grip enhancements are excellent. The inner tube has completely stabilized the grip, no slippage. And the o-ring adds a little extra tactile grip when picking up. It extends about 1mm beyond the tail cap radius — just enough to be useful without being obtrusive.
/\ — photo edit caused tint skew in last image — actual tint is neutral not cool