Thanks Darrel.

I've already fixed the time problem you mentioned and I did it exactly as you suggested! I'll need to post the new code soon as I also removed one of the buttons - I stole another idea I saw on youtube where a press of the btn will increment the digit currently displayed. A lot more elegant and works well.

I've got the clock running in the lounge along with my nixie tube clock and it's actually very easy to read at the current speed. It's not at all annoying either which is nice.

Making up a nice wood housing for it now.