Wow what a fire starter, IMHO I think you had better either delete this post or provide more details. My comments have nothing to do with defending Fesler either. There has to be more that you are not telling.
No business would hold a car hostage just because you decided not to build or sell. That's just nonsense. My guess is that since you actually sent the car to them, they have actually spent time in some form on the car that they would like to be paid for. Again, give the whole story or no story. Not to mention it wasn't cool hijacking this thread. This is not the way you build credibility. Just some friendly advice for what it is worth.