WARNING! THIS WIP; FINAL VERSION HERE: https://www.thingiverse.com/thing:5437413

On photo you see pre-fixed model. You see it's for a bit askew because during printing printing plate unstuck from magnetic plate.

I made some changes (increased radius of stand connection, increased height of stand rod and increased length between stand rod and fulcrums)

PS: thing is work-in-progress because i haven't tested my changes. But theoretically everything should be fine.

UPD: Final version here: https://www.thingiverse.com/thing:5437413