Two sanding blocs I made in order to build balsa planes.
They work well and are easy to hold.
Since the shape is simple, it doesn't require any support.
This is my first post on thingiverse so I hope everything is clear enough

Sanding surfaces:

-Small block: 40mm x 60mm
-Big block: 60mm x 200mm

Be sur the have enough building height to print the big one(since it is 200mm long).

Ultimaker

Ultimaker 2

Doesn't Matter

No

min 40%

Juste sand the under of the block with a flat surface and sanding paper. The cut sanding paper at right size and use glue to keep the sheet in place.