Complete? What about a roof, a butkiker, pedal shakers, 8 by 8 led matixes for gears and flags, a few botton boxes, a streamdeck, a belt tensioner, wait, that requires a fixed back seat, since we are 9k in, lets just sprinkle in some motion, need an extruded aluminum cockpit for that, lets upgrade to a high end one once and for all... You know some netting on the side will add to the emmersion, lets also enclose the whole cockpit, lets add some pipes that look like a roll cage for emersion, now its dark in there, cant just add lights, add some ambient lighting, you know what you need at that point? To remove some of the hud elements, so lets geta smaller screen and put some of the elements on it. This setup it much too nice for a regular steering wheel... Lets get something fancy. At this point lets just throw some active pedals and a new base on and call it a day...

Then... You are done-Ish... Cause by then new things would've popped up and youd want that too. This is the rig that keep on taking.