After tinkering with the smaller K40 we decided it wasn't quite up to our needs and decided a small upgrade would be more beneficial in the long run. A 12 hour drive and overnight stay in the Lake District later and we arrived back home with a larger 50W machine, a second hand 80W CO2 tube and upgraded power supply. The 80w upgrade will have to wait as we want this machine cutting asap.
It's all set up and running now, but waiting on some extras to make the process a little healthier and cleaner. New extraction system (a bouncy castle blower), a water chiller, new focus lens, and a load of stock is due to arrive (3mm plywood, mdf and slate coasters)
Took a while to get aligned, but is cutting 4mm MDF in one pass now so happy with that.
Once this is up and running fully I can concentrate my efforts on finishing up the CNC build.