Bit of a long lecturey video on a few Locking Mecanum topics, reach out if you have any questions! (You can email [email protected], please CC a team mentor on any communications you send to me to follow YPP protocol)
v7 cad: cad.onshape.com/documents/8a22009546323d17e99ba385/w/c1d3e3839908942cc54e8bd0/e/2d046bfdc2b9211e8fdb649a?renderMode=0&uiState=6284efbc4e82b960ace2bfa6
(you have to copy-paste this unfortunately, not clickable)
I strongly advise against attempting to build v7 from that cad model. The sideways heat set inserts are very easy to burn yourself with while installing, and I do not feel comfortable guiding any students or encouraging any students to use this method when there's such a high risk of injury. Use this as design inspiration instead to form your own ideas!