i would venture that your experience wasn't an "even when switching to hanko*k ventus" per se. i'd suggest that any psm or squirrelly handling with those tires, was a direct result of those tires simply being inadequate to the task and demands of running on a porsche turbo. you got the flimsy sidewall party completely right.

and on a tangential but related point. any new tires until scrubbed can easily trigger psm intervention, and that said..

i recently put on new rt651's paired with ( new ) michi pss up front ( I'm rwd ) and not a squirrely moment yet, even during the first few scrubs. i ascribe the lack of any unwanted psm intrusions to the quality of the rears.

great tire, the rt651k.