Serious work well done.
At least you had the panel you cannot purchase-the roof.
My next S1 FHC project has rotten floors and a bent roof! I think it may have been dropped on its roof 20 years ago.
I am going to have to brace all the door pillars together before attempt to straighten the roof out. The when it is straight I am going to attempt to remove the floors and rear inner wings in there entirety. At least the bulkhead is good on mine.