Here's a tool I initially thought would make scribing vacuum-formed fuselages and wings easier. But I have found it useful for all kinds of model work, including scribing, gluing, and scratchbuilding.
It's quite simple: a wood black (the one above is 50mm x 50mm x 200mm); two bolts screwed into the center of each end of the block; and a washer and wing nut on each bolt. The lateral supports each have a vertical cleft to accept a bolt. So, you can rotate the block to where you ant it, then tighten the wing nuts to fix it in place.
I traced different grids on each face of the block. The size of the tool works well for 1/144 scale and 1/72 scale; I'm thinking about building a bigger one for larger scales. I usually fix the work to the block with double-sided tape or adhesive putty.
The materials and tools you need to make this model jig are inexpensive and can easily be found in hardware stores and home-improvement centers.
Tip submitted by:
Luciano MinaTurin, Italy