Its better to have spring at both ends (tail and driver) otherwise on harder bumps its possible to loose contact. When use on the street at active hours, people should use some sort of cap ( custom) at the head of the flashlight to provide cutoff for the upper spill, otherwise it'll blind oncoming vehicle/walker. And yes, that Convoy mode 35/40% provide enough illumination for longer runs. Cheers🔦
Any problems with flashlight blinking? I've seen some reviews with complaints about s11 loosing contact if you knock it at the tail end. I got the same issue with my pioneman k36 which I use for cycling. The blinks happen only when I hit a pothole or when I get on/off the curb. By the way, convoy s21e with 25 degree TIR lens on sst40/sft40 makes very nice bicycle light also.
