Thanks for all of the replies! I did try the exacto knife route, but my hands are not steady enough to make straight lines on smooth plastic. I opted for the Dremel tool, but I used a cut off disc/wheel that I had previously used to cut my track, this produced a nice slot for the connection point on the sign. Now I will warn you that it burns/melts the plastic and it smells, but if you can get past that, it does produce a good result.
I will post some pictures of the layout and I will include one of the sign.
Darren
