Long time pro guitarist here, with a bad shoulder and back! I need to find the best system for relieving the strain on my back and shoulder. I'm using a lightweight Yamaha electric RGX A2 with a strap that is supposed to distribute the weight more evenly across both shoulders, but still, at the end of a couple hours of performing, I'm a wreck.

Any suggestions as to the LIGHTEST ELECTRIC around, and perhaps a strap that might help, would be greatly appreciated. Thanks