It may sound strange but why not simply produce v1 lantern body
with USB micro and C port on the same aux board just wired in parallel below one silicone cover
And then in V2 this aux usb board gets replaced with new driver
So the upgrade would only need 3 LED wires soldered and likely a Thermal resistor with 2 wires for precise thermal regulation
It would, but it’d be even nicer to get the lantern out before CNY shuts down China for a month.
Making the hardware theoretically forward-upgradeable might be nice for the handful of people who would bother, but shipping before CNY is something which would benefit everyone. So I would only attempt it if it won’t cause delays.
For the emitters, you might want to consider the Oslon Square 2700k 96CRI. The tint is absolutely gorgeous for the color temperature. No yellow/green. The one sold on Ebay is a slightly rosy 6U tint bin and a high flux bin for the CCT and CRI.
Additionally, E21A 9080 tint mixing would be a really good option.