Really nice looking bike! I'm a sucker for the compact long wheel base or crank forward type bikes.
Btw, are we sure the front wheels are a 305 and not 349?
Also, I believe 45psi should be enough to get good performance even with a weight of 200lbs. It would depend on the suppleness of the rubber maybe. But also wider tires roll better:
https://www.schwalbetires.com/tech_i...ing_resistance