Elegoo Mars 3 / 3 Pro - Build plate 45° dripping support

This is a slight remake of Chiquiruli's beautifully-designed model.

The only changes are:

• Addition of a hole to the arm, to allow for screwing in…
• … a printable screw, to secure the arm to the printer in a more stable fashion (in the original, every time you try to pull out the build plate from the arm, the arm comes with it)
• Some higher tolerance on the support, so that it shouldn't require sanding on a well-tuned printer

I suggest printing the screw with 0.1 mm layers. The arm itself can be printed with 0.2 mm layers. 20% infill is enough for both.

The screw includes a hidden reinforcement channel, so that it shouldn't break so easily. Still: it's a 3D printed screw, so don't force it too much!