First fixed TT for me. Interesting experience... Was planning on riding 56x15 but wimped out and went for 56x16 at the last minute. Course was the H10/17r, and predictably I felt both slightly over-geared on the drag up to the turn and then under geared on the way back. AP was pretty equivalent to geared 10s but the NP was a fraction higher. Frustratingly I was only 7 seconds away from a course PB, despite not having my disc and my position feeling noticeably worse than my proper TT bike.
Pretty fun really but I'm going to struggle to match my normal TT position with the track bike geometry.