Just a thought - is there any reason that the cable from these ratchet style shifters couldn't be replaced with a solid rod and a couple of heim joints?
In my instance I could mount the mechanism forward of the axle tube on the left under my left calf then make a shift lever leaning over and coming up next to the drive shaft shield directly in front of the diff centre. If that makes sense.
would you be able to get in and out without stepping on it???Cable is too simple and to have a lever mounted to the shifter down there , the throw would increase so much that you would run out of room in the cockpit