Good stuff Andy.
I totally forgot to mention - I still have the mould I made for making resin 'Gee' and radio boxes, and could mould some for you and send them to you, although by the time they're produced and sent, you will probably be well into the build. But let me know if this is of interest, and I'll sort it. I need to make some more anyway, for another Mossie build, and a Lanc at some point, as the spare sets 'pinged' into oblivion - can't find them anywhere !!
I found that if the actual dimensions for the 'Gee' monitor are used (that is, the depth of the box, front to back), then it wouldn't fit into the kit cockpit at the correct angle. I therefore made the box slightly shorter and, once fitted, this can not be noticed.