RE: First runs on F-Type 158 + 11.0
Since you asked :-).......
I believe Roger often runs his boom at about chin height for general sailing and I do the same. Maybe forehead height is a little high?
I use 28" harness lines with a seat harness, ( hook relatively high for seat harness). You might find 22" lines too short in combination with such a high boom. I would also suggest a seat harness for 9m and larger sails.
Roger will probably suggest adjustables but I went for fixed to eliminate another thing I had to adjust :-).
I was given a simple one sided Sailworks adjustable outhaul and I could not sail without one now even though my largest sail is only 9m. I believe it is a must.