I agreed... the pucks that I'll be returning generated too much heat that I am afraid to charge over night... let alone sticking it on my headboard overnight...Don't do it! I'd definitely cause a fire hazard as temps reach 45°C when charging. Unfortunately, the Magsafe puck doesn't work with USB-A Non-PD charger so you're pretty much stuck with fast charging.
Double sided tape does the trick, i personally use the ones that come with command stripsI have been using mine on my bedside table but from tonight am not going to. Not for the heat thing but because I can’t stand that you need two hands to get your phone off the damn thing! I can sometime prise it off using a finger on the cable but even then the “puck” slides across the table. No, I’m just going to use it when I travel (not so much nowadays) and go back to my Nomad charging dock.