Hey John,
someone just asked what to add around the bare machine recently, I answered space to reserve around the machine, also dust boot overhang (front and rear), space for serious cable management (drag chain width computation), the protruding length of the Journeyman X stepper motor to the right and of the Y stepper motors to the rear (and possibly longer specimens, if upgrading to closed-loop steppers or servos later (see also Upgrade to Elite Series)). Note that the rear Y steppers can also be at the front and the X stepper on the left, since you can mount the rails in the other direction and then check the “reverse” setting in the controller in case you want the steppers at the other side. Also think of protruding stock cable connectors on front and side. I would take into account the possibility to put an enclosure (e.g. like this one) later.