Well, 20 minutes to install the rack sounds about right. It would have taken me about that amount of time, except that when I thought I was done and everything looked good, I noticed the right rear directional was not very tight.
One thing lead to another, and in order to tighten it, I ended up removing the seats and rear fender to get access to the nut. With the nut tightened all the way, the directional was still loose. I ended up by removing the inner metal bushing that the stud passes thru and placing a nylon washer onto the bushing. It took up the spacing that shouldn't have been there in the first place and now all is well.
I had the same problem with my headlight being loose too. To remedy that, I removed the bushings and ground them about 1/8" shorter. Now the nuts and bolts form a very secure fit.
The rack looks good and will surely get a lot of usage this summer. Thanks for the help.