My current guess is that I need to get precise length (6 ft?) (still I have no time to extract cables) with both ends threaded, not just one. Then probably I will change transmission end ball pins to plain cylinders which will allow to use much better spherical bearings (even better than Numeric's bushings) , such as
SSPM, SSPF Stainless Steel Rod Ends with Reinforced Nylon Raceway, Molded Race Rod Ends.
'Porsche' implies people are eager to pay, I guess. Racing cables for other brands cost less (Acura?) with the same 'quality'.