thanks, I'll look into that!
I am looking at using CAT6 cable throughout (purely for the extra shielding capabilities) and I'd like to limit any wifi/rf modules as I feel that wired is a lot more reliable and longer lasting. I don't think any single cable would be longer than 40 meters but I'd have to do some calculations, the building itself is 21m in length and I'd like to take all cabling as direct as possible to a server room where the primary controller will be housed.