I'm not sure if this is the right sub-forum to ask this or not.. But, Ive noticed when I play my Modulus 6 at gigs, my back is KILLING me afterwards. Bad backs are pretty heriditary in my family. I find I play my SX Jazz 4 a bit more because its lighter. Those of you with heavy basses, what kind of strap do you use?? I'm looking for options to help make playing more comfortable.