Ha interesting. I guess we think a like. I found a forum member in 2019 with a package that I ultimately passed up for the mamiya 6mf. I want to hear your experiences with the 645
I have both complete camera systems and they do compliment each other. They are dissimilar enough that I enjoy picking one or the other depending on what mood I’m in. Bronica has a better meter and is slightly smaller, where as the Mamiya is better built. Both cameras have great optics. If you have any questions feel free to ask. I’ve been shooting these two systems exclusively for about 15 years. Wish I could help you find an RF645. Keep an eye on KEH.
I did years ago. I don’t use flash much in my photography so I sold it. It did ok for regular indoor pictures but I prefer to bounce flash off the ceiling inside and so I now use my Nikon flash when I need to. For fill flash outside I feel it would be ok for that.