Lots of good input in this thread, many thanks. Hard to make a decision! Esp with the Britpart tool now also in the mix, as per the other thread...
Seems to boil down to Allcomms vs IID, which boils down to having to cart a netbook around everywhere vs. not being able to use the device if the matrix display fails. Pity the Allcomms won't run from an Android device as that would get around the netbook problem straight away.
However, I think I know how to make the right decision. Andy_J used to have a Lotus Carlton, so he must be right. IID it is then
Cheers
Jerry