Spring Fin Strap Retention Block

thingiverse

Do your springs pop off your mushrooms? (No, not a Mario reference -- I was more of a Colossal Cave type.) After a couple of years of sadness with the original straps, I finally got springs for my side-post fins*. (OG Jetfins forever -- but these Oceanic Accel are a lot nicer to travel with.) So, if you're putting these on side post fins, there's a bolt to keep them from popping back off the mushroom. There's no risk of popping off when worn, but in the bag, or wrassling through the surf or up the ladder, turns out it's possible. Oops! So, in my typical pattern of overly complex solutions for things that aren't much of a problem, I offer you not just one but two different designs for preventing pop-off. The first is a space-filler that is locked in place by the retention bolt that's not doing it's job. The second fills the entire bracket space, and is locked in place by the spring bolt -- theoretically the retention bolt isn't even needed, though you can keep it. (The copper filament is just what I had loaded today -- for real use you should print in Authorised Black or Instant Death Yellow.) <b><i>Scuba diving is an inherently dangerous activity. You assume all risk related to the use of this design. Do not taunt Happy Fun Retention Block.</i></b> (*Unsolicited endorsement of https://www.ebay.com/usr/getwetstore -- inexpensive, quick ship, and literally the only vendor I found with clear precise documentation of spring strap measurements.)