Thank you for the responses.

The meter and framelines are that big of a deal for me.
I tend to rely on my handheld meter more (a habit picked up from my LF). and I prefer the 50mm frame-lines for my 40mm. Even when shooting on the R3M. I tend to prefer the 50mm framelines. (partically because I like cropping and I can't actually see the 40mm framelines with my glasses on my R3M.