If the v2.0 (aluminum frame, steel rods, rollers, beefy motor, Lithium motorcycle battery) would have added 40 pounds to the weight of the whole painting. It would have been completely obvious to anyone who handles art that something was going on. Also, Dave never accounts for the loss of height that would have occured between the girls skirt and top of her head if part of the painting is in the rollers.
Dave needs to stick to electrical engineering because he sure doesn't seem to understand weight or anything with three dimensions - outside of a flat pcb.