That does seem reasonable. Being from a software background I definitely get the continually evolving bit. It is a bit harder with physical parts and customers that might be attempting to upgrade from any given past version to current. I would say you have the right idea of changing one section at a time.
I look forward to the new rollers for the future. Your new corners fit great even made with a pretty sketchy printer. The current roller locks came out way too tight. I’ve got some sanding to do this weekend to hopefully rescue them.