There was a really helpfull article in the Hornby magazine a few months ago about building a level crossing. How about following this up with an article about how to motorise your level crossing? Personally speaking when I go to exhibitions and see layouts which have these, I wish I could do something similar for my layout. I have checked the internet and must admit dont understand most of the methods suggested. I always enjoy the plain english that is used in the Hornby magazine which has inspired me to do a few projects mentioned in your great magazine and I am sure it would make an interesting article.