Dear MoverZ
I am sorry to differ.
Please have a look in attached file.I made two file with two different pressure.
To get same spring load we have to change Toll setting pressure stiffening "No"
For default setting or if set "Yes" caesar will change elbow flexibility factor as ( pressure dependant) per Appendix D B31.1/B31.3 note-7.

Spring work as per stiffness property , So if piping stiffness property changes spring must react on changes.

Regards

Habib