Long story short, I made the decision to buy a Best Track, Champ Timer, and GPRM software. I was worried about getting everything in time for the derby and emailed Steve at Best Track asking whether they could meet the timeline since the normal build is at least two weeks and shipping would be another week. Steve responded saying they would do the best they could and believe they could meet the deadline.
Steve exceeded expectations and went above and beyond to deliver. The track arrived within nine days. I assembled it today and am a happy customer. The track took some time to assemble the first time, but I am reasonably confident I can do it in a relative short period of time now that all the angle connectors have been aligned and tuned. I installed the software and ran a "trial derby". I am still getting up to speed on the finer points of the software, but I feel much better about having a successful derby.
Thanks to Best Track and thanks to everyone for contributing to my other post. I will be a more frequent poster, but want to make sure that I acknowledge some well deserved thanks.