Not sure about the finishing yet, just trying to get as much done as possible first.
center parts of the disks
drilled a hole, then made another piece that slots in the top, this will be the cap.
milled some 3mm slots at 90 degrees to allow the triangles to fit in.
turned the cap down and recessed it so the dome can sit in the groove
cut the triangles to size and mounted it all up only to hold it against the picture and see its way too tall!
So cut it down, and the triangles too, this is much better.
...make 2 of them obviously
they aren't a tight fit in the slots so I have drilled a tiny hole in the circle under the edge of the triangles and then drilled into the trianges and tapped them M2 and screwed them down from the underneath, this was a bit fiddly.
and the other one too, the top caps screw into place.
. 
Couple of years and I might have the money tho, I'm sure you'll be a source of inspiration! 
beats me, It wasnt like I woke up one day and could do it, it was more over a few months. I've always had ideas of making things in my head, I dont mean "i'd like to make this, or i'd like to make that" more like I can look at something and work out how its been put together. All I had to do was make the step up to actually making it for real, it has helped me doing it this way as I make each part in my mind before I cut any metal, thats why I dont have to make a cardboard moke up except for the very complex parts I cant imagine..
that would be a lot of work.
I am loving this so much very very impressive 
