I recommend DK7ZB yagi antennas. I built this one: 5-Element-50-Ohm-Yagi for 70 cm. https://www.qsl.net/dk7zb/start1.htm
I used 6mm aluminium rod.
Node is mount on my roof 11 meters above ground and it’s powering by 6m cabl from USB charger. I added a Li-pol 4000mAh battery.
It works perfect.
I’ve been building DK7ZB antennas for a long time and I can attest their worth. Stick with the 50 Ohms designs, as they’re the least critical, but please do try to work with sub-mm precision when cutting and positioning the elements.
Also, place a couple of ferrite beads on the feedline, as close as possible to the radiator, to improve currents balance.
With these clamps the elements are mounted isolated 2-3mm above the boom. The screw has 3mm and is stainless steel. Boom is 15mm square aluminum profile.
The distance between the radiators is 8 mm. Remember that the length of the radiator is measured end-to-end (323 mm with the 8 mm, so the aluminum rod is two pieces per 157.5 mm). The housing is sealed with a polymer adhesive
Your dipole bracket has a very interesting design, really clever!
However, a single turn of coax may not present a high enough impedance to common-mode currents. Further, it might be better to have the coil perpendicular to the dipole plane and closer to it, to avoid pattern distortion. But ferrite beads are really the easiest solution to raise impedance