Hi,
I am about to ready to sell some quantities of such boards. I am in the process of creating "The Bicycle Light" and every part must be ideal or approaching it. Looking at Cutter's 10 mm square boards I realized that that they were much less than ideal ones:
1. they are not convenient to wire in parallel when they are next to each other because of soldering pads;
2. Carclo's 10415 oval optics can be set only in one direction on the board up because only one diagonal has holes;
3. thermal management looks not convincing;
4. they have often LED not exactly in the center causing problems with optics.
I was looking for 10 mm square boards without such shortcomings but I failed. So I decided to design "the ideal 10 mm board" as I understood it.
Here are my board (left) and Cutter's (right):
As you can see, my board can be stacked in any direction to make parallel or series connections, it has no issues with Carclo's 10415 10mm oval optics, it has good soldering mask that means no centering issues and it has definitely better thermal management. My board is made of 2 mm aluminium and Cutter's of 1 mm aluminium.
Here are examples of soldered boards. XP-G R4, Nichia 219.
With optics.