The Pro-S and later versions have automatically engaging frame lines when you use the correct RB-Adapter plate. If your RB67 is just the Pro version, you'll need to mark the framelines on the screen with a pencil.
Apart from that, is there my recommendation for changing the screen ? Is there anything better or should I stick to this one ? Which looks fine as it is, just wondering.
You can remove the focusing screen and mark the underside with a soft pencil. You'll have to determine the right place for the lines. I have done this - it's easy and causes in problems.
The photo came out very nice. As far as stating did you get it right is a bit subjective from my personal POV. The reason I say that is I've used my 150 SF lens with all 3 inserts off and on and the look seems different from shot to shot using the same insert. I guess the only point I make is I'm not sure there is a set rule that if I used the # 2 each time the look will be the same each time. So, for me personally the research continues with regards to the 150 SF lens. For me it is a fun lens that I like experimenting with and do not feel any anxiety from not getting the "perfect" shot, if there ever was one to be made.......