Thanks to DJ and his very in depth measurements for rockerline and outline we now have a new tail :)
Thanks David, it was really helpful.
Replaced about the last 20-25cm or so (it was sawn off at about the midpoint of the centre finbox) - was a long project just when I had time between other boards.
Not bad for a freebie

Halfway thru ugly pic:
and all purrrdy.....