Hi Jo and Happy New Year!
This may be as good as it gets and, from my side, it looks pretty good. We just need to get a way to assembly the boards in such a way as to keep then secure. I don't mind that it's going to be permanently in the box, so long as we can put our heads inside to have a look (and cut bands) it's perfectly alright. If you could help me devise a way to enclose it so that it's safe to put a (mildly) wet gel on top I'll be happy to take it from there.