Lexel, are you looking for the smaller 4 holes in the 33mm MCPCB? I don’t have the D4S yet but I do have the boards and I do have a working X6 using this board. About to head to bed tonight but I can get measurements on the inside ring of 4 small holes if that’s what you’re looking for…. I get 20.0mm across center to center, so 10mm from center of board to center of the small inner circle of holes.
I should point out that this is using a set of cheap plastic calipers’, my good ones are out in the shop on the lathe…
Owner of this specific D4S said Hank custom made for him. However, when I e-mail Hank about the custom aux LEDs D4s, he replies “I’m afraid we are not able to offer such option.”
May it is just for China customer or for Hank’s group members only.
The aux LED board uses some common cheap LEDs and they shouldn’t be incredibly difficult to swap out. It’ll be useful to have hot air or a wide solder tip for unsoldering the stock LEDs though.
It looks like it uses the same type of LEDs as several of the clock kits floating around lately. I don’t know what type they are, but they can put out a lot more light than what the D4S does with them.
These LEDs don’t have much metal to grab onto, so I’m not sure the 2-iron method would work unless you have a third hand to grab the LED from the sides at the same time. That method works with resistors and capacitors, which typically have a metal surface to press the iron against, but I haven’t found these to work that way.
Putting them on the board is easy, but getting them off without destroying them is difficult.
This pic, when zoomed in, might show enough to explain why: