Scale Soaring UK

Hello
Anyone able to help me with finding the recommended C of G for an old Avoncraft Slinsby T53 glider that I am referb at the moment?
Its an old 2 channel glider from the mid 70's, pictures attached below.
Please pm me if you used to have/still have one and can remember where the c of g was.
many thanks
Paul Callaghan

Paul, i think folks have missed this post as it is really for things people want to buy something -why not re-post in 'Glider Guiders' - I know there are a couple of online calculators so you may not need the original plan.

I’m pretty sure this query has already been answered by Roo & others & due to the forward wing sweep I think the recommended balance point turns out to be at the wing LE point where it meets the fuselage.
I’m sure that Roo will be along sometime to confirm where he balanced his T53.