I’m sorry but you can totally control the margin size in LaTeX if you learn the right incantation

backslash UsEpAcKaGe letterpaper H-maaaaaaargin point seventy-niiiiiine inch brackets GEOOOOOMETRY

then you spread the entrails slightly and stab towards the sky. Really don’t see what the big fuss is all about.

Picking a higher density of the material just means the one gram would occupy less volume, it doesn’t affect how much energy that gram is equivalent to in terms of E=mc2. For that calculation, as the equation implies, only the mass matters; a gram of feathers is equivalent to the same amount of energy as a gram of lead for that equation. Now, this equation is in fact a simplified assumption; if you launch your feather at relativistic speed, then we’re talking

It doesn’t fit all the criteria you mentioned, but if you don’t print that much and wanna try a dryer before buying anything, you can make a cardboard foil tent for your printer bed and use that https://m.youtube.com/watch?v=MflrcqNozqs

I had a blunt umbrella several years ago (not the compact model however) and it was great quality and would buy it again. I sadly lost mine a while back

There’s a channel called Improbable Matter on YouTube created by a scientist formerly working on fusion with a super interesting series about fusion power https://www.youtube.com/@ImprobableMatter