After a couple of tryouts this is my absolute favorite.
Simple to operate, looking good, easy to install, fast removal and installation, easy to print.
I had no trouble learning to use it, just enjoyed it from my very first ride.
PRINT USING ABS for heated grips as PLA will warp!
Be careful! This might be a dangerous adjustment to your bike!
You are responsible to make it, to install it and to use it!
I just provided a suggestion of what I liked on my Pan European ST1300 heated grip bike!
Added native DesignSpark mechanical (TM) design file.
Please let me know if you improved the original design.
I fixed the ring with a 3mm SST lock metal screw.