I made this for the Sota Beams 7 meter telescopic mast. I printed as it 30%. Done a couple. Just drop it on your mast while you are putting it up and feed your EFHW through as it extends. I have tried ones with a hole and found that because I use my antenna wire lock the attachment would have to stay on the antenna wire. So I designed this with an opening that I can pop the wire out of to put away. I required no support to print but your milage may vary. Hope it helps some one.
Mast I used https://www.sotabeams.co.uk/telescopic-masts-sotapoles-7m-and-10m/
The author marked this model as their own original creation.