Thanks,
I'll try the Supaseal route.
The thing is, Euro parts are supposed to do
reconditioned calipers. The handbrake
problem is well known on the Mk 2 Gti and
nearly all must have failed for that reason by now.
If that is the case, then Europarts must have a
solution otherwise they would have loads of calipers
they couldn't recondition !
I dunno when an O ring is a seal and vice versa -
then again I'm not a mechanical engineer !