All noted - I know where to look if I have a problem come the winter months. Early days yet, only had it in the air 3 months. I bought the wind struts and it sits well in the wind. Where I live now is higher than the last place which was down in the valley, yet it is less windy than down in the valley due to nearby trees, and properties including Pickering Castle to the west which is 200m away. I had a choke balun about a foot long from my previous Optibeam which I had at my last QTH and used that, also SO239 I didn’t request N type. That Optibeam 11-5 was a fantastic performer but would cost 3-4 times more than the Hexbeam, would weigh around 5 times as much and could not be turned by the G1000 rotator.A £1000 Prosistel was needed and I had problems with that rotator with the potentiometer burning out due to static build up in thunderstorms. It blew 3 pots in 8 years. I probably had another 3 db gain on most bands with the Optibeam over the Hexbeam but it was large and very heavy indeed.
I’m very satisfied with the Hexbeam performance for its size. its pefect for the type of house and garden where we now live. It is very broadbanded with low SWR as you have probably also found - and the impedance does not seem affected when it rains. I also found in testing that mounting a 4m/6m yagi 1 metre below the bottom of the hex does not affect the performance or matching. Being top fed helps I guess.