When to use 'Support' option?

[curious aardvark]

not bad.
About the only thing I'd have added would be a way to change the number of magnets and automatically move them about depending on number and size.

Or possib;y even change the number based on the size of the box.
But that's really overkill and i rarely bother to do stuff like that, when you can just copy and paste an existing line and change a couple numbers.
;-)

Also if you have the same thickness wall on all 4 sides of a box, it's much easier to have: 'wall thickness' as a variable and saves you defining all the interior measurements of the box seperately.
It also then allows you to use the wall thickness in placing things around the model easily.

Your method allows for different thickness walls, kind of.

And yeah the forum software really does not like a lot of browsers/opearting systems. We've never really tracked down exactly what combinations work best and which ones are a really bad idea.

I think it just doesn't like apple - but that's probably just professional bias, as I hate them lol

But for someone who hadn't even seen openscad a couple weeks ago - damn impressve :-)