Angelblade

Shilkas won't appear on your RWR until the last seconds before they open fire on you, Strelas won't appear at all because they're using IR-guided AA-Missiles. As for the 300p, I don't know. Did you place a whole S300 site (there's an extra object in the editor for this) or just a launcher vehicle ? Try a 2S6 Tunguska, those little buggers show up on your RWR quite early.

This is an issue with my x52 pro too, so I know exactly what you're talking about. But it lasted many hours of flying for this problem to appear in the first place, until this point I was totally satisfied with that stick. Some lubricant helped me out of this, just make sure you don't use something too liquid, this can even make the problem more worse. I used some ball bearing grease and now it works like a charm again. So for me this is just a minor drawback on that otherwise really good piece of hardware.