Thanks. I followed your advices and it's gettin better. I recorded the last 3 evenings. The sessions were quite long, about 6 hours each of just playing and recording guitar. Always the same piece.
On the first day, i realized, that some playing styles dont fit with my guitar. I have a jumbo lakewood, and it seems that it doesnt like strumming, and need to be finger picked.
The second day i had a bad noise on my recording which came from my RME intrrface on the analog inputs, when i have also a digital input with gain running.
The third day i realized that my breaths are way too loud on the recordings. I already found a thread here to this problem and need to see if i can position my mics to get rid of that. I have a bad nose breathing at the moment. My nose needs a nose septum correction. I tried with rx7 to delete those breaths, but it doesn't really seem to cancel those out, but cuts them out, in between parts.
I have small condensors for my guitar(sm81) in stereo. Maybe try with a ldc rode Nt-2 in figure-8. My u87ai sounds horrible with the guitar in some frequencies, so i cant use this.
Otherwise I have to record short guitar parts, where I focus on my breathing and crossfade them, or try to breath through the mouth the whole time which makes it difficult..
This is very tideous.. but I didnt lost the fun yet