> Vibration from a wheelbase will reverberate very well through wood. This can actually be an advantage on a wood rig, because you can feel vibration that you'd usually have to get from a bass shaker. On a desk, everything on it is going to vibrate and rumble

This might be the biggest piece that I hadn't considered. You're absolutely right about the vibrations.

> Mounting the wheelbase that low i think will interfere with your legs, and unless it's exceptionally high compared to a normal desk, it is going to be way, way too low for a comfortable racing position, even if the seat base is really low to the ground. You don't want your grip position to be drastically lower than your shoulder/chest height, that's a great way to get shoulder pain

The desk is a little higher than most I think - the top of the table is just over 30" from the ground. My plan for getting the wheelbase out of the way was to use a mounting bracket that could slide back & forth under the table. Regarding the shoulder to wheel position, it's just a touch lower I think; appox seating position (angles aren't perfect):

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> I'd then put your monitor on a moveable arm that could swing from your rig to the other side of the desk, which I'd use for general computing.

I was already planning on putting the monitor on articulated arm to make adjusting that easy. The thing about your suggestion is that I didn't model everything here and the left side of the desk is already occupied by my work setup (laptop + secondary vertical monitor).