You're much braver than I am!!!
I have a bunch of their planes and I usually replace the hardware as much as possible.
Re: Clevis
Yup, don't use the provided ones particularly on the Evergreen and Fly-model planes. They will shatter easily.
Re: Retracts
Anyone's you can fit in.
Re: Servo pockets.
For an arf, having to remove 1mm is pretty good.
I'll take that any day over what I've had to do to some big name ARFs.
Re: Manuals
Manuals, Manuals? We don't need no manuals?

Re: Distance
ONLY 6MM????
You're doing well!!...
My NP Fly-models Extra 330's .60 instructions had it 20mm off which I discovered AFTER fitting and cutting the cowl... ouch...
Nice big honking hole in the cowl now.
The newer CMP kits seem to do a much better job with all of this, but you are still advised to be prepared to replace hardware whenever you see anything not to your liking.
So yeah, the on some of the smaller planes the included hardware is not good.
The larger planes do a bit better, though I've had a few small planes with passible hardware ( such as the small electric Ultimate ).