That's how I felt when I built my CMC. Every damn thing had to be modified or customized along the way and it was taking forever (I'm sure Merklin is chuckling about now). Then, towards the end (little did I know that I still had three years to go from there) a Hot Rod friend convinced me to take it to another hot rod friend for body finishing and paint. Those guys took quite a while (the job was used as filler), but the end result was amazing - Way, way, WAY better than I could ever have done on my best day.
Quality work costs, in time and money, but it's worth it in the end.
Carey has a great operation going out there....... Greg Leach, too, but as has been mentioned, ANY customization screws up the work flow and causes delays and a lot of running around for the builders. That's the same for cars, furniture, appliances, computers and anything else. The time estimates that builders give are based on experience and current conditions and those conditions are changing for them daily. It'll be tough in Manufacturing for the foreseeable future, too.