Hi Sergei,
I and Ref made and test the adaptation of your Air mod to GWX.
Our main problem was exactly this: How to adjust only the planes guns without brake the LRG mod. IIRC Ref put a not convencional approach to solve this, messing a bit with the planes guns angles. The result is quite good, but not perfect. I tried your original mod on an stock installation and i can say that in GWX the behaviour is slight different but yet very good. I guess that we don't have better solution for this until now.
Probably you will want to adjust them for your like as I did in my GWX installation!
Ref can reply you better than I in this matter. Let's wait his reply!
And nice to "see" you again mate!
PS: I couldn't try your tree and land mod yet. Any chance to make the land also be render at the same distance than the objects on SH3/GWX?
Rubini.