I have used a "palm rest" - for want of better words (forget its real name)- on my other bike. fits on twist grip but (about) out of way of hand. when you want to give your hand a break you can rest your pad on the pad part & hold the throttle open that way.
can't take hand off bars but gives your fingers/grip a rest.
if you want to take it off grip to have maximum control in the curves it comes off in a second to shove in your pocket(once you've pulled over, of course).
J.C.Whitney & other outlets carry it, I know.
not as fancy as some but maybe in keeping with Savage's pretty low tech stance & does not cost too much as I recall (though a little overpriced for a basic bit of plastic, maybe - it came with my other bike so don't know exact price).
sorry can't download a picture (I'm low tech too!) but suggest you get on Whitney's mailing list if not already on it & check it out in the catalog or just go on their site to see it.