Aluminum boom and elements should be strong but light. Each element is fixed by you with a small conical screw. This seemed to keep the elements in my build fairly tight, but I'm concerned that the wind and weather will loosen them over time. After assembly, the SWR for 2m and 70cm was far from the same. I spent over 45 minutes working on the setup and was only able to tune both bands by adding short extensions to the 70cm fixed drive units as shown in my drawings.
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