Nice writeup and photos Vik.
I really enjoyed riding your Tikit, it's a very nice bike. The Tikit I rode when I visited Bike Friday was OK but yours was noticeably more solid and had a better ride. Presumably the optional heavy duty construction had a lot to do with the greater solidity of the bike and the Scorchers were responsible for the better ride.
The tire pressures on the Birdy when I checked them this morning were 105 psi for the Kojak on the front wheel and 80 psi for the Maxxis on the back wheel so most of the work on bumps was being done by the suspension.
This morning I tightened up a few things on the Monocoque so I'll commute on that this week and if the weather is good and our schedules synch. we can get together again and you can try Monocoque with Marathon Racer tires and Capreo Nexave 24 speed gears. My turn to buy the coffee!
We will have to get some photos of the surface of the trestle bridge. It certainly can get pretty mean if you take it at speed. I think that the rough ride is due to differential wear between the thick softwood planks but I have not looked closely.