i've never had to use spacers, though it is possible you may.
check to see if your cable is lined up right and goes straight through the hole, you may not need them.
did you route your cable properly? you may not have, how is yours routed?
also, the kit will give a whole different feel. the stock quadrants tend to leave a lot of mush at the top of the pedal, vs when you have that adj kit installed, you adjust nearly all of the mush out, and it feels a lot tighter.
cable routing or spacers will be your problem. I didn't read if you got the adj or oem cable, but if you keep having problems and have an adj cable, purchase the oem non adj cable.