Hobbie Hawk balance point?

Hi ...

Can anyone help me with the balance point for a vintage '70s Hobbie
Hawk model glider?

I have one ready to fly. It was given to me without a manual ... so I
am guessing at the balance point. Currently it balances just forward
of the main spar.

Any comments on the balance point or flying the Hobbie Hawk in
general?

Any generic help with the balance point is great too.

Thanks