Adjustable Alignment Jig

This will hold small part intersections like bulkheads to a keel squarely while gluing. Good for model boats and airplanes. The spring isn't perfect but it's what I had to hand. Center post is a piece of M3 allthread. Most holes are 2.5mm and can be tapped M3.
2019_12_10:
Replaced the flat disk with a much taller disk that increases stability and makes the whole thing a lot less floppy.
Not sure why but two photos got squashed; it really isn't that fat!
I used some socket head cap screws for some assembly but setscrews will give a smoother appearance.