Boyesen Power Reeds work great for the least amount of money ( about $35. give or take ) & throw the spacer away, I think they cause more air leaks than any performance gains, but if you want to use it - cylinder/spacer/reeds = low end, cylinder/reeds/ spacer/ = top end, at least that was the answer I got to the same question. Make sure to use a good gasket sealer & check for leaks.
okay i will prob throw out the spacer just cause i dont wanna spend the extra $$ lol
i think i will prbo get a new pair later on but im more lookin for more things to make it look kewler at the moment