Owning several kayaks but only having one Landing Gear System can become very expensive if trying to outfit all of them with this type of setup. My solution was to create a knuckle system for each of my other kayaks and share the landing gear legs when applicable.
Please note that this is not a super simple – off the shelf parts – slap together type of diy build but am sharing the idea anyway for those whom may be interested and don’t mind taking this type of approach to creating a hopefully longer lasting build solution. Currently in a ( Work-in-Progress ) phase for longevity under real world applications.
The 3D printed PETG plastic insert is sized for a aluminum square tube that is 1.75″ x 1.75″ with a 1/8″ wall thickness. The length of the square tube is to be determined by the builder since it is specific to his or her kayak. I went with 32 inches on the length of the aluminum square tube for my Native Slayer Propel 10. Concerning the four angle brackets, they are made from the same square aluminum tubing and are 1″ wide. Hardware used to attach the angle brackets to the accessory rails are modified stainless steel 5/16″ x 1″ carriage bolts. I wanted the knuckle spacers for my build but it may or may not be needed for your particular kayak.
► 3D Print Files → https://www.thingiverse.com/thing:3612817