Thank you, @Ratchett , that's very kind of you!
So first, I have to confess that I was wrong about the Nitecore model number. It's a UM20. I hope that's a good charger! Here is the link:
https://www.amazon.com/gp/product/B00PGD3W38/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
As far as the sleeves go, there is one other slightly annoying thing about them: The inner veins of the sleeves which are meant to "hold" the battery centered, could be a bit longer, as the batteries like to slip out without any friction to at least keep them fairly steady while I'm fumbling the assembly into the battery bay(s). But it's only a minor thing; perhaps it's not good to even slightly impinge on the battery body....??
So, assuming the UM20 is an OK device (like to hear from all of you who know!), and that it's meant to be compatible with the sleeves, then I'm happy to accept your offer to have new ones made!
Ahhh that's why! Phew haha - still not a problem - Can you PM me and send me a picture or tell me how far off the pin is from center so I can adjust accordingly (I can adjust the fit also - that's partially due to variances in plastics when printed - different colors shrink differently lol). I love the opportunity to make my products more 'universal' - I don't have every external charger on the market so I need to know if it works or doesn't work. Early editions for example had text which ruined the 3D print, that was quickly eliminated to increase print quality
The UM20 charger will work just fine for charging your batteries
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