The job I've been working on just now is a bed, a chest of drawers and a bench for a holiday unit. The drawers have an exposed box joint on the corners. All done in solid oak.
I looked for a quick way to do the repetitive joints, spent nearly a full day working out a way to make a jig but still didn't find anything that would be accurate enough for nice tight joints. I eventually ended up just marking out one part of the joint, cutting that then marking out the other side. It took long but I got a nice joint in the end.
Got it done and I was pretty pleased with how they turned out. The height of the drawer was 290mm and the joint was decided to be 8mm so it didn't work in equal to the width, I just left the top and bottom joint wider by a few mm's.
There are still pen marks on the joints. The way I like to do it is cut the first one to your lines them lay it over the side piece and mark the edges of the first piece you cut. When cutting out the side piece cut up to the line but leave the line on. Test the joint and it should be tight, if it gets too tight and you can see any bits starting to flake just pare the tiniest amount back with a sharp chisel. Know what I mean, man.
I'll glue them up then cut the joints flush and sand everything ready for finish. Long job with a lot of bits that need to be right but it's going in the right direction.
Remember that if you or someone you know would like something made then give me a shout and we'll work something out.