I have a Zone VI. Switching out the bellows is a very quick operation, it shouldn't scare you off. You can shoot with a 90 with the standard bellows with limited movements, but once I got the bag bellows I never bother, it's just so easy to change. I also like having the option to shoot with a 65 or wider. With a 90 or shorter you are asking a lot of any pleated bellows. Are you shooting landscape or architecture?