I didn't know about the focus handle. It looks like there's one at KEH, if I have the right thing---it says "quick focus handle", and looks like it clamps around the lens and provides a lever that sticks out to the side. At seven bucks it seems clearly worth it. I've gotten used to the little focus tabs that a lot of 35mm RF lenses have, and it seems like the handle may have a similar feel.
Even in a quick-and-dirty scan, I'm really impressed with this camera. Attached is my annual photo of a dying pumpkin vine, handheld at 1/125. I actually tried a (very careful) handheld shot at 1/30 and it was surprisingly acceptable; I don't expect to be able to reproduce *that* very often, but my guess is that 1/60 ought to be OK.