Now that I have had a few months to play around with this modded light, everything seems to be working fine even with a Olight 16340 10C battery. The best lows of any light I have and a decent beam with a LH351D 4000k 90 cri using the stock reflector.
Jon_slider had problems with the lumens fluctuating when he rotated the light as seen here. Sunwayman V11R on Ebay, $18.99. 2 left. - #270 by jon_slider
With all 3 modded V11R’s I have, none experience this issue when rotated in my lumen tube. I don’t see more than a 7 lumen difference on high while rotating the light 360 degrees and this could mostly be the slight change in angle when trying to hold the light straight up and down while rotating. In my lumen tube if the light is tilted just slightly down towards the tube path the lumens reads slightly higher, just a few lumens. So none of my modded lights appear to experience this issue.