cuda2k- keep in mind that the various saddles you have there may not place your pelvis in the same place in relation to their profile. If you have set up you knee over the pedal axle the same of all, and use the same length crank... then working from the crank center is probably the best route for general position comparison.

Also, the various brake lever and handlebar shapes, will guide your hands to various places on the bars, so for that upcoming custom build know what you intend to use and test flight it before you lock in the design.

The Gazelle's aggressive front end is not too big a surprise, benelux was known for many criterium races.