Bad analogy.
Was there a signed contract? Are all BLF designed products made exclusively by Lumintop? Look at the BLF Edition Master List
It is more like lotus or mclaren sourcing different engines for different needs.
Admittedly I have no idea what agreement was made behind the scene. If Lumintop already started manufacturing or buying parts for the flashlight then there is no need to consider switching. I don’t know if the second prototype was made by lumintop or by Fritz15.
If Lumintop hasn’t started the process then I don’t see anything wrong with switching companies. Who knows, most likely they are out sourcing it to other small companies. I don’t know how much manufacturing Lumintop does in house.
edit: First prototype was made on a lathe by Fritz15. Okay, second prototype was made by Lumintop.
The host was still designed by Fritz15, Toykeeper handled the firmware, and Tom E did the driver. Lumintop did not design the flashlight.