i am sure that it is not everyone that has the enviable flat line of site install.
what are you doing to get around the tree issue.
i have put up masts but i feel that i am just creating lightning rods even with proper grounding.
has anyone used the pigtail version that is available with a higher sweep antenna. - if there is such a thing.
So your 900 gear isnt quite working in the trees well? Must be thick trees.
I’ve been using 2.4’s with reflectors through some trees. The 900 stuff works great through trees. It so hard to compare trees in one place to those in another - especially different parts of the world.
Higher gain antennas are always good though… 
Aaron