Solved - duh, I had a senior moment! :)

[pigpog]

I was asking a question generally, not about that modification specifically. I mentioned I had it installed as I thought it might help anyone who thought they could help me, perhaps I could have worded it better. I think it's just one of those days.

Incidentally, I have since discovered that I can do what I need to do with what I already have, so my apologies for overlooking this. I shall go and stand in the corner now and look for my brain.

Thanks to anyone who read this for your time!