This is a version of my "HockeyBoom" 3D-printable boom ends, but instead of upcycling an ice hockey stick into a wingfoil boom, these boom ends are designed to fit round profiles. Four different diameters are included, but please read the printing notes carefully to achieve a good fit.

Here's the HockeyBoom: https://www.myminifactory.com/object/3d-print-hockeyboom-wingfoil-boom-duotone-slick-compatible-233110

Wingfoiling is a fast-growing great new sport. The hand-held wing is like a small sail and it can be used on water, land, snow or ice. On water, the wings work best with hydrofoils, flying over the water surface with the help of the wing that remains submersed. On land, they can be used with skateboards, inline skates etc. One of the easiest way to learn how to handle the wing is to use one on ice or snow with skis, snowboard or ice skates. Winter "winging" is a truly accessible sport that is easy and rewarding at any age. On water, it's a bit challenging - getting the hang of it is sort of like learning to ride a bicycle (once you know how, it's not that hard, but there's a bit of a learning curve).

Duotone makes the excellent Slick and Slick SLS wings for wingfoiling. These wings feature a rigid boom instead of handles that are seen on most other wings. Duotone has booms for their wings and offers them in aluminum (as a more affordable option) and carbon fiber.

Ever since the Slick was introduced, people have also been making their own booms for the wings. For most, it's a quest to make an affordable lightweight carbon boom. Duotone has also had supply chain issues with their carbon booms.

The photos show a boom made using inexpensive 25mm aluminum tube with 2mm wall thickness. The boom ends up weighing about the same as the less expensive Duotone Silver Miniboom, so there's not much point in using these 3D models to make an aluminum boom unless Duotone stops selling their booms and you need a replacement.

Here's a link to my video on how to make a HockeyBoom:

youtube.com/watch?v=-stZgCOYuoo

Some options for buying heat shrink grip:

amazon.com/Greatfishing-Fishing-Bulding-Waterproof-Insulation/dp/B07H7ZFKT3

s.click.aliexpress.com/e/_DC8dXlp

Note: The 3D models for these parts are based on the HockeyBoom ends, which have worked well for me and the booms have proven to be strong and performed well. Since you will be 3D-printing the parts yourself and assembling the boom, I can not guarantee or take responsibility for the durability and suitability of the boom for its intended use.

I have only printed the 25mm version of this file. The larger size are parametrically modeled based on the same base model with a slight modeling tweak for the 29mm and 30mm versions to allow for the larger diameter tube. A 25mm or 27mm tube will result in a comfortably small diameter boom once grip is added. The 23mm front end piece was created from the 25mm version by adding more thickness to the part that touches the tube.