Here are the only two images I have easily to hand (pulled from fbk.) of me riding my
FAT Chance Buckshaver size large (need to verify this , but it is certainly bigger than Medium)
Am also around 5 11” ish in height , was running a 120mm stem in the images.
I also rode 2 differing size M Yo Eddy for awhile (sold on here years back) could ride both ok / no prob bit for my own ergonomics on reach / handling the next size was the sweet spot. Just sharing my riding experiences, not saying yay or nay.
By coincidence was research Buckshaver sizing , as spotted a custom FAT City staff build on eBay recently in USA, but concluded after a conversation with seller would be too litttle / compact for me…I posted the auction in the Auction Watch zone on here…
P.S. am a little biased , but the Buckshaver is actually my fave FAT Chance frame…
and I also have a FAT Chance Titanium 1993!
( hope this opinion does not break retrobike
)