CAD the front of your reference drivetrain or derive the tubes and modules from the another swerve drivebase you designed (e.g. from 2A). Make these a composite part. This is only for referencing.
CAD the superstructure tube (mirror and add the mirror to the drivetrain composite for referencing). Use the assembly mirror featurescript to add mate connectors to the tube for easy assembly.
Derive and transform the nut strips for referencing
Design the plates based off of your main layout sketch
Create the shafts using the shaft featurescript
Create the intake arm and spacer to attach a sprocket to it
Create a mate connector on the pivot point in the main layout sketch, owned by the origin cube. This is for creating motion in the top level assembly.
Use your chosen belt/chain generator featurescripts to create the belts and chain
Name and give materials and appearances to all your parts