Looks like it fits on ok then, I take it you had to sand about 1mm off the bottom to get it to sit flush and bottom out.
The numbers probably won't stand out as much against a black background. You need a steady hand to paint them.. I thought I could maybe use a small sponge with a small amount of paint on it to just lightly brush over the numbers. That technique has worked well for me when I've made model houses in the past.
Can't wait to see Big Andy's artwork