Dave,
I did not realize that these were Eoin's kits. In that respect, my opinion regarding the kits and their pricing is unbiased by any relationship personal or commercial with the vendor. So as a consumer these kits are expensive, as has been expressed by others on the thread also. I do not doubt that they are good quality, but I just cannot really see them becoming a mainstream product at that price.
You are quite right when you say that Eoin has done a great job on the Dart. So good, in fact, that I would consider buying one from him and I have no particular interest in the Dart itself!
That being said, I stand by my comments regarding the pricing of the kits.
The constructive part has already been stated in the original post which is that these would become very popular if priced more modestly, aimed at the average modeler, however you wish to define that.
Good night