I think he did 2 very important things, 1 deep drill holes on sustain block to the point the wrapping is protruding the holes but not touching the saddles, 2 widen and taper the bridge plate and sustain block where the strings come out. 2 is most important, Galeazo Frudua has it on his last video on Stratocaster setup. It shouldn’t be difficult for manufacturers to build this instead everyone sells us snake oil and remedies that don’t work like living your nuts and washing your penis or putting a locking device on your nut which sounds painful. The nut is not the main issue.