Hey other bass people! I'll start with saying I'm not sure if this is the most appropriate forum for this, and if another one is deemed better, my bad. So. This (as I understand it) is somewhat unconventional, but I feel that it would suit my play style somewhat. So on a four string you'd have low-high Bb, F, Bb, and Eb for this tuning. Doing it this way, I'd have those four strings, as well as a high Ab or I may just leave the G as is, undecided on that front. So I'd imagine from a setup perspective the tension across the neck would be kinda weird, and this may be seen as unnecessary by some but just work with me, please. What all would I have to do to get this going? As I see it I'd have to: A.) Adjust the truss rod. B.) Get my nut bored out some for the low Bb (more on that below). And C.) Find a set of strings that would work for this. The bass is a Yamaha BBN5, if that'll help in any way. Right now I have it in standard with IIRC EB regular slinkies .45-.130 and as it is I feel that I'd like a thicker string for the B, therefore probably even more so for the Bb. Maybe a .140. And so for the remaining four, I'm thinking slightly lighter than a typical (for me) four string set of .45-.100, due to being up a half step from E standard. Or is that philosophy unnecessary, and I'd be better off/fine with a standard set, or possibly even a heavier than usual, provided I can adjust the truss/action accordingly. I realize there would be a pretty big difference between a .140 Bb and a .95 or .100 F, and it'd be cool if could try to get things as close to even as I could. I'm considering getting a four string set then getting an individual Low Bb to go with it, OR maybe getting a set of strings supposedly designed for Drop tunings and then getting an individual high string for my G/Ab. So, did I miss anything? Am I analyzing this way too much? Stupid idea? Maybe, but such is life. I'll appreciate any responses and help toward this.