'As for the bonding issues claimed there are many old aircraft still hacking around so it cannot have been that much of an issue.'
I can confirm that it is a major issue on any Grumman produced between early 1974 and middle of 1977 when a purple glue was used to replace a vanilla coloured glue.(They went back after '77 to the vanilla glue)
'Purple Passion' as it was commonly known can cause you to have some very (and I mean very)expensive problems with wing and fuel tank debonding.
Personally I would avoid any Grumman built in the 'purple glue' years. A good inspection of an aircraft will tell you which glue has beeen used.
The vanilla glued aircraft have virtually no debonding issues.