so you have to put the light head to your cannister, to change modes?
certainly workable, but not sure id like it.
could you also have a magnet embeded on the goodman?, attach head with bungee, and move its position towards the magnet for mode changes?
also, could you tell me the model No of that torch?, iv been picking up some of those smallsun ones hopeing to do the same, but only one has enough material to fit a decent oring on the lens.