Not really a bass building question, I'm afraid, but it nearly is I'm thinking of building a simple slide guitar out of a mahogany plank and some guitar bits. As I'm a bass player, I'd prefer it to be pitched lower than a standard guitar (as I'll probably be amplifying through a bass rig). I was thinking something in the region of a low A or B as the bottom string (ie Baritone guitar or slightly lower). Portability is going to be a major consideration, so what do think the shortest reasonable scale length i can get away with is? I am planning on using fairly heavy guitar strings (.012's maybe), but am open to suggestions. I'd appreciate your opinions.