If you know how you want to use the car you won’t have too many regrets when completed. I spent a lot of time thinking about how I would use mine and why it was such a desire for me to build one of these. The real issue is what you are willing to spend on the things you want. My opinion is, once you have decided what it is you are going to do with the car, stick with the plan, but put the very best components and effort into the plan that you are willing to afford. There are some things I wish I’d done sooner though. I’m currently installing foot ventilation on a completed car and it would have been much easier doing it during the build stage.