I had a Pro II (since sold) while I had my Pro and the AE Finder 1 ( side dial) but I never tried the combination.

I was always under the assumption because of what I read that the side dial type finder would only work on the Pro.

The nice thing about both those finders is that the shutter speeds are stepless so they are VERY accurate in my experiences.

I do plan on getting a Pro II again but not in the immediate future.