Have you guys seen the 'anti cramp' gizmo thing that Scottoiler do .. a small black plastic 'paddle' that slides over the throttle grip.
You can then rotate it and adjust it so that your wrist is resting on it (when cruising) to hold a constant speed. Saves the need to grip anything and that gives your hand(s) a rest , without the vibes. Bit like Cruise Control Systems .. but much simpler.
They come in two 'widths' wide and narrow .. and two Grip Sizes .. Fat for Heated Grips or Thin for standard grips.
The wide one is (IMO) too big .. it gets in the way of your thumb when you do need to grip the bars. They 'rotate' on (and off) in two seconds .. no tools required .. so no risk of having them go 'walkabout' when you are parked up.
I have recently been trying the narrow one over heated grips .. this size seems to work OK .. once you get used to them. Like most things new .. they look a little bit strange at first .. but of course it's all out of sight under your hand when in use.
Ideal for the motorway commute cruisers and long haul touring enthusiasts .. a very simple idea that helps stop cramp and vibes, etc. Worth a go for about £5.00 .. I recon.
Stay Safe
Trev (I'd guess Scottoiler might show these on their web-site ?)