Hi Steve.
Thanks for the information provided in this blog, Some great ideas, for signal building no matter what scale or country you are attempting to depict. I notice how you build your ladders, and I have 2 ladder building jigs, to suit 7mm and HO/4mm. if you are interested I can send you one of the HO Jigs to try. For more infor on the jig, go to http://www.krmodels.com.au/krm_misc_004_page.html.
Regards Keiran