Change clutch encoder with S6 4.2

Hello you ..8 - Specialists,

first of all the question, if as S6/C4 driver you can also post something here "should"?! But with the techn. Expertise, which is obviously present here, I hope you can/want to help me a little bit.

Drive as I said an S6 Avant with the 4.2 V8, as a 6speed switch.

For 4 weeks, slight problems in coupling:
1. difficult (but it was always - thought it had to be so with a V8)
2. Clutch pedal comes back the last piece "not happy"... often only after giving gas... Sometimes not at all. The clutch "seats" again properly.

-#3. After studying the forum here (and my rep. guide): Finally a closer look at the pedal + cylinder: In fact: encoder cylinder licks "a little bit".
I hope that's the cause, and not a consequential defect...

If I follow the clutch threads here, the change and then the airing doesn't seem easy - not even for every workshop?!
Does jamming of you have "the right tips"?

Thank you in advance

Uwe