I wear a device that's like a weight lifter's belt. On the front it has a short leather strap that hangs about where my belt buckle is (this position can be rotated from side to side to taste). Attached to the leather is a Dunlop straplock. This clicks into a recessed Dunlop receiver drilled into the lower body edge of my bass. Therefore the weight of the bass is pretty much all on my hips. I wear a regular strap to keep the bass in position but only about 10% of the bass' weight ends up on my shoulders. When I decide where to install the recessed straplock receiver in the lower edge of the bass, I hold the bass with 1 finger to find the balance point that I like, and that's where I put it. A little towards the neck to bring up the headstock or a little more towards the bridge to bring the headstock down: I choose precisely how I want the bass to hang every time. Right now I am out of town and cannot get pics, but next week I will post a separate, mini thread to illustrate this. It saved my bass playing because I had severe shoulder issues and could only stand with an 8 lb bass for 2o minutes beofre being in severe pain. Now bass weight is no big deal. I still prefer lighter basses, but I could play a 12 lb bass on the belt all night if I wanted to.