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@Barkuti, that is not actually the case. I did have initial problems when asking and “probing” a lot of manufacturers about the springs themselves, but once I found my current manufacturer, I did not have any of my problems.

They made my springs perfectly to my design requirements, the specifications of the real springs themselves were very close according to my simulations(mine did not take into consideration the contact resistance of the plating itself, and assumed a perfect weld), and thus, I am very happy with the 1st and 3rd Gen springs especially(the 2nd Gen spring designs were certainly not optimal :P).

Besides, I don’t recall Convoy using any BeCu alloy.

Currently, they are using a phosphor bronze alloy, which is good enough for most applications; my own springs are a step up from that, and are competitive with the Emisar BeCu C17500 short springs in regards to conductivity/mm length of wire(still worse, but not by much), with a good size, better mechanical properties, and lower prices(gold plating in small quantities is rather expensive as I’ve said before…).

Overall, I am satisfied with my current generation of springs, but I want MORE obviously from them:
better materials, better plating, better design, more of them, but I am limited by funds.

Still, thank you. I hadn’t even thought about CCS materials. I’ll look into it and perhaps do my usual math/simulations.