This is for using double sided tape, I use the kind I can get at the dollar tree, comes off in small squares almost exactly this size. You would think it's welded on after its been there a couple hours, no lie, will remove paint when you take them off if your not careful. Very sleek, you don't even notice them, the waterproof 10mm lights fit in tight and you can put them every so often.
Print with a brip on their end to save material so you don't need a raft. May print laying down, not sure. Will try in the future.