I would like to have someone on this site that has had the experience of re-doing their GTR/GTO cylinders re-done with Nikasil. I have read some info on the forums, but would like to know directly from someone what they have used for rings? ( i.e. iron or chromium faced rings ). I ran across one stating it does not make a difference except the iron faced rings have a faster seating period. Just want to know for sure from someone that has had the experience and what the result has been. thanks, bsforever