Making the step from pub hero to ENSL Gather-competent

I can be devastating on pub servers sometimes. I wrote a thread a while ago about consistency, and found the responses there very useful. I come up against top clan guys on public servers and am rarely embarrassed by how I do relative to them.

BUT:

I'm not a good player when it comes to ENSL gathers. My tracking with an lmg somehow goes out of the window, although I tend to do okay with the shotgun. My skulking is so-so.

Can those of you who have successfully made the transition from pub hero to someone who is at least competent in gathers give me some tips? Maybe it's psychological... I don't know...