Some of my old Stellas ( '98 issue ) have the after market knobs on them due to the original knobs have run it's usefull life but my newer Stellas ( '02 issues ) have the original knobs , with gloves I can feel the difference in feeling but not enough to want me to change the still 100% functioning original knob to an after market ones , but that is just me , others my have different preferences .
Jon .