Hi I just signed up and hope someone can help me. I have a Warwick 5 string fretless bolt-on thumb bass. The neck is so heavy (body light and small) that it slides downward, and I have to use my fretting hand to hold it up, Not good. Is there any method or strap that will help? I,m using a neoprene strap as it slides less on my shoulder than a leather one, but does not solve the problem. I could always get a 4 string which should have a lighter neck, but that would be more dough, has any one found this to be a problem with the 4 string?