I went round to my Nan's today and Noel helped me to cut the wood and to build the incubator.
That countersink was Noels dads and was used to build spitfire planes :D
It took a fair few hours, and I still need to do the wiring and put the roof on, but its looking more like an incubator :D
Heres the finished(ish) thing:
The top door gets to the eggs and bulbs, and the eggs sit on the mesh you can see through the window.
The bottom door is where the water tray goes to keep humisity up so that the eggs don't dry out and chicks don't stick to their shells.
Thanks Noel :D
I still need to buy a hygrometer.