Originally Posted by sureshs
Federer helped design the Kompact Center in particular. That is used in several models other than the K90. So, it is not like he designed the K90 in particular.
K Factor racquets also contain other groundbreaking technologies like Kan'tFight Back err Karophite Black, Konnector wings in the K1 model meant for people over 90 who plan to enter the tour (not that there is anything wrong with that) and Komfort Bloke err Yoke.
Where'd you get this little nugget of information? Federer moonlights as a racquet designer, and for a racquet he doesn't even use? Sounds like more Wilson sales rep bs to me.