Flat Adjustable Tablet Stand V5

An upgrade from old design at [here](https://www.thingiverse.com/thing:6389788). Printed with Kingroon KP3S Pro & FLSun T1 Pro (at 90% size)

Basically traded off some rigidity to achieve flatness & easy assembly, requiring design to be printed with higher (>=50%) infill if planning for daily use on laptops.

- V5: Redesign to use two support instead of one, improved twist resistance.
- V4: V3 with locking mechanism preventing widening. (check image) Also expanded 'shelve' area.
- V3: Reworked one for more aesthetics & rigidity
- V2: Initial prototype


Features:
- Supports 7 + 1 angle configurations (counting front side of sawtooth)
- Thin, flat design when folded
- Easy to print
- Zero tool, easy assembly
- Cool looking Gehenna Logo

Notes:
- Weak against lateral stretching force on base plate
- Cura will complain about surface on part 2, safe to ignore. Union operation went kinda mess, but not something serious requiring manual fix.

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How to use:
1. Print both *p1* and *p2*
2. A