Phil, thanks again for the info and your offer, I will PM you soon as I have looked at some tx modules and decided which to buy.
No rush at this stage as ordering anything from HK these days seems to take a few weeks at best to arrive anyway.
Actually, now that I think of it, I do have an (Orange) tx module in an old Futaba tx that I converted that uses the 5 pins, DSM2 I think, so would be great for some immediate results in the meantime while I track down some small boxes to use.
I like the "old style" design and look of aluminum boxes like some of the ones on your website but for now will go with whatever I can find just for demo purposes.
Cheers - Mark