Just been reading [B]C-Bus Application ID Numbers[/B] and I found: [INDENT]Traditionally, Lighting was the only Application available, and hence is commonly used for purposes such as curtain control,......[/INDENT] That set me thinking that I should be using a different application for my curtains which, just as the document hints, are currently on Lighting. So, I had a look through section 3 of the document and did not find another application which seemed better suited to the curtains (except perhaps Room Control System - which it says is no longer supported). So, I was about to post a question along those lines, when I happened to be looking in Toolkit for something else. I then spotted that, so far as I can see, my input units only support a single application each. This suggests that using (for example) a 5034 to control three lights and one set of curtains can only be done if the curtains and lights are in the same application anyway. Thoughts? Thanks. Nick