Roller and cam arm pin is the same P/N.
Screw on the Roller pin has lock patch, and needs heat to remove.
The spider is meant to be removed similar to older spiders. Many videos/info seem to say remove the 6 bolts instead which is not the recommended method.
Springs are measured at the same length as my21-earlier team springs (2.7/1.7) to keep the rates having a common meaning.