Thanks Gerry, yes I see that could work. I've not worked with Flash before, but I suppose the same could be done with a screen designer(?).
I did think about doing a separate app that would receive data from TCP/Modbus and display that, you could use "localHost" when running it on the same PC. But to be honest I'm not that good a programmer. I might look further. But as a quick fix I like the Mach3 dual screen approach. Again many thanks.
Cheers.
Pete L.