Steve,
Thank you for your many postings which have helped me in starting my first signals. It just so happens that my first signal is a tall LSWR co-acting signals so I have been using the MSE etch as well:
I have slightly changed the mounting although still using your turned brass tubes. I couldn't see how you firmly attached the signal into the board apart from relying on a tight push fit and the attachments to the servo to hold the signal. So I've added 6BA bolts to the brass plate and then this also holds the servo board in place (still to be made). Also a positive attachment for the signal itself into the tube.
I used the MSE ladders but the sides slightly thinned (as they are overscale but even thinned are too thick) and rungs of 0.2mm wire (which are to scale). Unfortunately scale ladders are extremely flimsy so I had to compromise. Southwark Bridge Models make some to scale but they are frightenly fragile. I added guides for the wires but made them slightly different to yours and they look reasonably like those in some pictures:
I'm currently building a similar tall signal (home/distant) and then can paint them before attaching the arms and operating wires etc.
Regards,
Ian Spalding