As you can see on my HF2V pictures, my HF2V is mounted in between a lot of trees. There is even electric fence only 10 meters from it. Nevertheless, it performs very well both on the RX and TX side. It has also been standing for more than a year now and can cope well with the winds on the Danish west coast.
The seller pointed out to me that he does provide support for grig for 12 months after purchase. If that doesn’t work out, I can also try to help, although I am very busy at the moment.