so I got frame and sanded it down to see and yes it defo cracked
cracked seat stay
then whilst looking for some forks for it I stumbled across a donor bike:
Donor bike
so from this wrecker I used the forks, Seat stay, cranks, chain (pc31 which my 0.75 wont even go into) seat post clamp and brakes.
Complete build
Which left me with a 17″ mc 30 frame with a stuck seat post
MC30 Stuck seatpost
Which came out quite easily after a quote for £120 from the stuck seat post man, and 3 hours of carefull filing:
removed with files
So Now I have a viable frame to make a small genius up for my daughter!
I still need a colour matched black/white seat stay for the 20 though…