One of my favorite things about playing 5 and 6 string basses is that I can jump in with pretty much anyone regardless of what tuning their in. I currently play with a college club that is working on putting together a show that will be rotating musicians in and out for different songs. There are many guitarist, several drummers, horns, keys, and violin players that all contribute to this project. I can jump into a song in standard tuning, 1/2 down, whole step down, drop D, or 7 string without having to re-tune. One of the guitarists has similar musical taste as I do and we're considering a side project focused on gigging in the area. He usually plays 1/2 step down. I'm wondering if I should tune to match or transpose. The benefit of transposing are not having to re-tune between projects. The benefit of tuning to match is that with his love of the key of E flat minor, I could go up or down for 5ths (I like having both, as they build and resolve differently and can change the feel of a progression). Any thoughts?