A rod holder that fits your rail
A parametric holder printed for the exact tube diameter your boat has — not a standard no boat actually follows.
The problem
Rails come in everything from 22 to 32 mm. Shop-bought holders solve it with rubber inserts that slip, or screws that scar stainless steel.
The fix
The model takes the diameter as a parameter. You give me the measurement, I print the clamp in ASA with the right radius and a soft TPU liner against the tube. Socket angle is selectable: 0°, 15° or 30°.
ASA was chosen because UV destroys PLA in a single summer. This one has been outside for a full year with no cracks or discolouration.
More ideas
A hook guard that actually stays on
A soft TPU clip that snaps over treble hooks and jigs so they stop catching nets, clothing and fingers.
Gear tags for nets and pots that last
Name, phone number and registration embossed into the tag itself — not written in marker that vanishes in three weeks.
Replacement handle for a reel nobody makes parts for
A good reel becomes scrap because a 40-krone handle is out of stock. That part can be printed in carbon-filled nylon.