Better still might be to have a backing plate the same as the inner diameter of the headtube so you end up clamping it and distributing more load around the headtube. If there's room to do so of course. Pretty sweet nonetheless.
Sure, you need a plate to have a flat ground for the nuts, but that might also be a good version.
The problem with the threads in the frame is the force is acting against the frame only at probably 2-3mm eachs screw directly in the frame.
By having a plate inside an bigger holes in the frame the force would act against a much bigger area.
But as takman said: pretty sweet nonetheless!