I didn't use a jig to router out the area to hold the top bars, so they are not perfectly aligned. However, I did measure with a meticulous eye, so they are close. I did use a jig to put the boxes together, so they are near perfectly aligned.
Rex, thanks man! Nice to hear from you Hawk. Georgia Boy, it requires some patience, determination, oh and of course some time. It also helps to have a mentor. Without all four, I never would have finished it. I want to build another, but will have to wait till next winter.