Thought I'd post a few pictures of the QA that I'm making. Still in the rough stage. Some grinding and paint will help a lot. I have to say that I am a big fan of metal cutting hole saws! All of these 3/4" holes (16 so far) in 3/8" and 5/8" plate were made with the same Ridgid hole saw, and it still has a lot of life left. Proper cutting oil certainly helps too. I had to drill 4 holes in my bucket brackets, freehand, with a 3/4" bit and that was not too much fun.
Sweet thing is, the QA actually works (after a little selective grinding here and there). The stops I put under the bottom of the lower link line up the holes so slipping in the pin is a snap. I think it puts the bucket about 3-4" further forward so I may lose a little lifting capacity, but it will make going from the bucket to the forks (which are almost done) quick and easy. Kubota Trax - thanks for a great and simple design and thanks to everyone else for their input. I thought long and hard about the Deere design, but it would have required adding a mounting plate to the bucket brackets which I didn't want to do. This way, if some future owner wants to go back to OEM, he can. BTW, I can't say enough about the HTP 2400 mig I got to do this stuff. That bad boy has some guts.