A4 Notice Stand
thingiverse
Delivery people always seem to turn up when you're in the shower :-( Solution: Stick a notice outside the back door; so I printed one out, laminated it and stuck it to an A4 3mm thick perspex sheet. This thing is the stand that keeps it upright(ish). <edit>Fusion 360 CAD file added so you can tweak to suit. I also forgot to mention there are two holes in the back which could be threaded (5mm hole so M6 thread) and fitted with grub screws to nip the sheet in place. I've not needed them but if your backing sheet is slightly thinner than mine, you might.
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