It's likely the pin on the mod, not the splinter if this is happening with multiple splinter units. Test with a different mod.I saw this only once, in one of the first Splinters ever when I was doing beta testing. I adjusted the screw and it never happened again. Turning that screw definitely changes the resistance. I'd suggest using Locktite or similar.
It's quite odd that it's happening repeatedly and with two different devices. This is not a common problem with Splinters, in fact I can only recall one or two mentions of anything like it.
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