My RRT-01 arrived yesterday. I'm currently running it on a 4.2v AW IMR 18350, but I've also tried RCR and IMR 16340. I confirm that it is fully variable even with IMR cells. It smoothly ramps from an extremely low low (far lower than any other flashlight I own including the Sunwayman V10R) all the way up to maximum. It is definitely NOT getting only max brightness when run on RCR.
I don't have a way to accurately measure brightness but in a ceiling bounce test it is noticeably brighter than my V10R running IMR 16340 which is supposed to output 450 lumens. As such, I think that the 500 lumen rated output on 16340 is accurate.
We also don't know the electronics on the Eye10. From the pic in this thread it's 260 lumens. But we don't know if it gets brighter when using a 16340. Some lights don't. However, from the exterior styling it looks nearly identical to an RRT-01. If they've also got the driver from an RRT-01 then the EYE10 with its U2 emitter should be brighter than the RRT-01 with it's inferior T6 emitter.
That's great news about the arrival of your RRT-01.
Fireclaw, is your V10R the: XP-G R5 210 lumens, XM-L T6 460 lumens, or XM-L U2 500 lumen version? I have the XM-L T6 for 460 lumens.
How does the hotspot of the RRT-01 compare with the V10R for: tint, intensity, size? The RRT-01 is warmer, but less bright, yet larger in hotspot size?
How does the spill brightness and size compare? The RRT-01 is wider, and brighter?
The RRT-0's ring starts from the left at strobe, then standby, then ramps continuously from low to high; more than 270 degrees of turn just from standby to high.
What is the RRT-01's ring sequence like? The same?
How much turn from standby to high? The same 3/4 of a turn, or down to 1/2 a turn, or just 1/3 a turn like the V10R?
Now we can kinda work out what the Niteye EYE10 will be like...