So I've pulled my finger out and ordered some bits n bobs to get the build moving along.
I had some time today so I went out to the shed, switched on the brew-troller and had a look at some of the work I did last year. I taught myself to use it and program it but I'm looking at it today and thinking "This makes absolutely no sense what-so-ever". It seems I've forgotten pretty much all of what I learned and will have to study the manual again. Stupid brain!!! Why can't you remember the things I put into you FFS?
On the plus side, I've found some code to overcome my previous problems with using the temperature probes so there's that positive.