Sneaky Geocache - Fake Bolt Puzzle

A new sneaky geocaching field puzzle - One of my first projects as I was learning the basics of Fusion 360. 

Finders must choose the correct bolt (the white bolt in the picture is only to illustrate the logbook holder.). All bolts can be screwed and unscrewed easily.

The bolt threads are 30mm long with the head measuring 10mm high. 

The logbook holder hole is 35mm long x 13mm wide

There are three print profiles:

‘Plain base’ - Can be attached in any way in which you wish. 

'Magnet Strip' - This will fit a magnetic tape strip of 160x16x1.8mm

‘Circular Magnets’ - This has three holes for 12x3mm magnets that can glued in place.

Supports will likely be needed for the two magnet options.

The printing tolerances on the screw threads are 0.2mm to allow easy screwing and unscrewing.