Thank you!
@ Pocoloco: Unfortunately the bridges are only pristine. I did not even think about it with the small one. With the large one, I was thinking about doing it removable. Problem is, the smallest strength you can get pink foam (without a waffle pattern) here in Germany is 3cm. So I had to cut a 3cm board in half to get there. Over this length it got a bit wavy. Looks good since it gives the bridge a more natural appearance, but it also means that I had to plaster the pieces into the board, so that there was no gap. If I ever get crazy enough, I might end up doing another ruined bridge board.