I was trying to do the same set up... Apple magnetic charger and the 3 d printed holder.... Unfortunately, when I plug in the charger, I'm told it is not a supported accessory.....Decided to try one of the 3D-printed magnetic phone mounts where the base mounts in the 12-volt plug in that weird wasted space in the center console. For the past year I've been using a magnetic charger that I stuck on there with double-sided tape but I was kind of tired of seeing the cord and having the extra cord hanging down into the passenger footwell.
The new mount works pretty good - it's a bit loose in the 12-volt plug and the phone flops around a bit. Of course you can only get the apple iphone magsafe charger in white and I couldn't abide by a white cord on my black dash so I took matters into my own hands.
The old setup:
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The new setup with white cord:
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With black cord and the black sticker that comes with the kit:
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The secret to the black cord:
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Anyone else have that problem and where you able to fix it? Tried two different chargers to make sure that wasn't the issue.