Has been losing oil from both ends!!! 
A new cooler will apparently resolve. Thankfully the fittings weren’t seized.
Ian 
Its in sympathy…is there some redundant pipework you could chop out 
Been there, done that, when the a/c went.
I did ask if there was an uber-spec cooler but the normal one is fine.
Oh Bugger not more oil leaking!! all the pipes and fittings were all changed when the conversion was done so they should be all fine, I guess its just corrosion on the cooler that’s caused a hole.
Hope there’s no more scary leaks.
Steve.