I've made the H aerial using various bits of styrene, aluminium tube and brass rod. On the basis that a picture speaks a thousand words...
Before...
and after
The lights all work too. I've made up a circuit board to run separate circuits for the cabin lighting, navigation lighting and SIMS screen. I'll post about that board in a future post. Also, A fellow club member made a couple of small circuit boards up for me so that the blue and orange lights flash separately.
So, here's a picture showing all the lights on, which caught the blue and orange ones on. I'm both relieved and impressed that he wiring inside the mast still works!