I had been making my DT's using my WoodRat. When doing only one project at a time, it was taking up to much of my very limited time for setting up. I finally decided to try a DT jig and bought a Keller. The guy @ the wood show told me it would make perfect joints with first setup.
I could not wait til i got home to try it. Voila, I made both sides of a corner for a serving tray i intended to make. The joint came ut perfect with no adjustment necessary. I proceeded to make the rest of the corners and started assembly. It all worked out fine except when i got to the last corner, the joint was somehow upside down. I have the partially assembled piece somewhere in my shop. I saved it as a reminder. This past weekend, my Grandson and i started rearranging the shop. He spotted the frame and asked what he should do with it as it looked strange to him. Things were being moved every which way (meaning whichever corner you put it in will probably be wrong) and for now, i don't really know where it went. Once I put everything into reasonable rode, that frame will show up. It will be place back onto a prominent shelf as it has been for the past ten or so years. Glad to see others make the same mstooks.
Tinker