Yes I'm still Nippering (well I was until a couple of weeks ago!!). Story is, spark plug seized in. This particular plug hole was already repaired with an insert (not helicoil). upshot is an unrepairable head

The other option is a new head and I could try to get the bottom plug holes machined. A jig would be handy if anyone has one to lend.
Hopefully I will get it all sorted

In Anticipation
Kind regards
Stuart