Not that it's going to matter since this twist IS getting fixed, whatever the method, but I would like to make sure I understand D Hanson assesment/logic. I think that the better one understands the hows and whys the better one is at (in this case) building, flying, and CORRECTLY trimming a plane...seen far too many rudder issues "corrected" w/ ail and vice versa... along with other miscorrected probs.

so, in this case, the simple issue is;

1)the Left stab will have greater induced drag which increases toward the tip where the negative inclination is greatest [fig 1] moment offset by arm
2)the center of that drag will attempt to move to the right in order to be at the centerline of travel (much like a brick on a string dragging behind a bicycle) 3) this causes the nose to swing left and would require RUDDER correction. [fig 2] moment attempts to establish linearity

compound issues are;

3)stab is acting as a stabilator with a negative ang of atk causing tail down/nose up=climb tendency [fig 3 & 4] requiring up(actually, down...thx Bmthws) elevator trim,(more drag on left, more rudder?) while at the same time...
4)the greatest twist is at the left tip again creating a moment offset by an arm causing left roll tendency [fig 5] requiring aileron trim

none of this looks good for an air frame that has a bad rep for left snaps on take-off