These products look great. Every time I see your work I wonder how you seal the servo output. Trade secret I know.
I have heard that injection molding is expensive and guess that what you have produced would be expensive. You might try to expand your market to ship combat people that sink each other ship with BB's. This seems like something that would save expensive radio, motor, & servo equipment.
You may have already thought about this though.
Keep up the good work.