If you're in Perth WA, we got the wood from Cape Salvage in Landsdale and the vise we found at Carba-tec.
plastic mitre box
Step 1: Cut wood to selected dimensions
We started out using the square as an edge to run the guide of the reciprocal saw along to get a straight line. We moved to hand sawing for most of the checks out of the wood because it was more accurate.