well the way i make my things (so far), i dont have a cad drawing or any formal schematic. its just some chicken scratch in a notebook. but i will say that this took me about 100 bucks in metal, 200 in gauges switches and electrical, and lots of time and effort. if you dont know how to fabricate i dont suggest you attempt this. this is difficult work and time consuming. it took me months from the time i took out my dashboard, to the day the new one was finished.
also, it isnt very wise to openly post your phone number on the internet.
i havent posted a youtube vid of this, but i really want to soon . just need to find time.
also i found some nice padding for the frame where the passenger sits. pics and vid will be soon.