Maybe I'm a Wuss, but the only Basses I've gotten rid of in the past are a Modulus Quantum 5 and a LakLand 5. I didn't have any problems switching between them and another 5, or between a 4 or 6-string bass, but with RMI (repetitive motion injuries, Carpal tunnel, tendonitis, stuff like that) I find the 35scale uncomfortable. I just prefer a 34 scale. Like Danno said, practice them all on a fairly steady rotation, and even though I only have 34's, I try to start the night with a 4 to warm up. Play what ya got, Have Fun!!! The 'Ho....