yes, the structural components are the exact same from cortex to v5. The only difference is the electronics system, the old cortex system being not allowed for competition.
yes if they appear on vexrobotics website
Thank you, we struggled for a while in the game manual searching for the answer.
If you ever don’t know, anything on the vex store with the tag “V5” is competition legal (some cortex kits have V5 legal components, but are not labeled as such, but if you can find it in a legal V5 kit/ product, it is fine)