Yagi DK7ZB clamps for elements

DK7ZB are famous Yagi antennas. I built a dual band 2m+70cm with 5 and 8 elements respectively.
This is a collection of the clamps I designed so that they can be easily installed and removed for quick portable operations.

The boom is made of 16x16mm square aluminum tube. The elements are made of 6mm round aluminium tube. I use a small piece of 4mm round aluminum tube to make the element wchich is longer than 1m. I cut 2 x 50cm 6mm round tubes and I instert the 4mm tube in between. One of the clamp is wider for this purpose.
The feedbpoint also has a wider design to cope with the two parts of the dipole. The connections to the coax are made without soldering, the wires are pinched in the clamp and put in contact with the aluminium tube.
I use 13x3.5 round philips head auto-threading screws.

I provide the Freecad3D files should you like to improve or adapt the design to your needs or taste.

Print parameters :
PLA
50% in-fill