Peter, thank you for taking the time to explain the price point.
I don't know the background of the developpment of your fans. If you have a strong engineering process and studies for them, then the price is fair.
I bought the ones from Mibo, because they are doing what is expected without so much troubles from what I know and they were available at that time.
Are you offering them in other scale ? Or you plan only the 1/5.8th size ?
There is one part that would be awesome but unfortunately, I don't think any company will take the time to design a model for it, is the GAU-8/A canon. For display purpose, it would be awesome to have a true scale model of it !