This has now been tidied up and built with my single speed kit from my previous elevated chain stay commuter and a salsa fork. I suspect the plate was added after the seat post was out too far and there may have been some cracking. Seems strong enough so far and I am running a 400mm post well inserted into it. I shall add some photographs when I am out on it in the sun.
These frames do ride very nicely, so hopefully the repair will hold, this is just going to be a work bike so I am quite hopeful it will last
You don't pull on Superman's cape
You don't piss into the wind
You don't pull the mask off the lone ranger
and you don't mess with me and my friends...