Hi I recieved your kit today, and investigating the components and the board it seemed that L1 is a little big....
It doesn't fit between the mainboard, and the board at which the nixie tube for the seconds has to go.
When a tube will be soldered, it won't fit at all.
there should be a note in the manual that the inductor has to go really tight to the board, and that the leads on the tube holder have to be cut flush to the board.
Is that inductor already soldered in? I can see soem leads underneath it. If not, please trim off the extra insulation (careful!) and mount it flush to the board. I don't have an example with me right now, but I can upload a photo later.
The bit to trim is the red stuff, and to be extra careful of the wire under the insulation, marked in blue.
It IS tight, but it should fit. Perhaps I should make this clearer in the manual. :-/