My EOS din't come with the right allen key either, but it's the 2mm size (I think) It just says 2 on my multi allen key thing. It's really neat.
Perhaps you just are not going slow enough, maybe all you need is a touch more to do the trick?
Never heard of that happening. Maybe it isn't your macro line though. Might want to check that your fittings are sealing propperly, but since you said the end of the macro line was all chewed up, I'd replace it.
I do believe that it installs on the middle fitting.
I have the Green insert in mine, but I had to set my PSI to about 220 to get the correct fps (wanted about 260psi with 280 fps). I'd try it out with the dreen, but if not, just go one step down (blue I think).
After the QEV, yes, your dewll should be the only thing that changes.
And I'm not sure about the eyes. The stock ones work perfectly fine for me.
Hope that helped some