28/07/2026
Sometimes the best ideas come from solving a problem!
My father-in-law needed some replacement 30mm inserts for his fishing seatbox, so rather than trying to source replacements, I sat down and designed my own. After a few rounds of measuring, prototyping and testing, I had a design that fitted perfectly.
I thought if he needed them, there's probably plenty of other anglers in the same position, so I've now made them available in my Numonday shop.
The inserts are compatible with Preston OffBox 36 accessories and are 3D printed in durable PETG. They're ideal if you've lost the originals or just want a spare set in your tackle box.
For anyone with their own 3D printer, I've also recently added the STL download, complete with print settings, a 3MF file and a personal-use licence.
You can find the printed inserts here:
https://www.numonday.com/product/30mm-replacement-seatbox-inserts-pair-compatible-with-preston-offbox-36-accessories/
As always, thanks for supporting a small independent maker!
Independently designed and 3D printed by Funky Badger Crafts, these replacement 30mm inserts are compatible with Preston OffBox 36 accessories and are ideal as spare or replacement inserts. Whether you’ve lost the originals, need a spare set or are replacing worn inserts, these inserts are designe...