Well as things happen, dick-all has happened to any model building this last month or so ----
But another member has come up with another solution to make a 2-seater, Keith (talleng) has built this marvelous T Mk.22 where he found something more easily to use, a Canadian operated Chipmunk canopy. It sort of matches Greg's original idea perfectly and I'm going to add a couple more 2-seaters to the build using this canopy.
Here's a pic of Keith' 2-seater which has given me some new ideas ---