Had another play around with the vernier, now I've got the hang of it.
I think this is what you are after Alistair, or maybe just 30min instead of 60min. This will be very easy to use, and very accurate.
Thanks Bojan, I wish you had mentioned it earlier.
Cheers
Richard
ps To those of you who have the earlier versions v.1
If you like to upgrade to v.2 just let me know.
