we use the graphtec fc8600 as well. We have a 45 degree blade and a 60 degree blade. Both blades can interchange for kiss cutting or through cutting, as long as you are changing the location where your blade is seated - position 1 vs position 3. If you try to cut through cut on position 1, you will eat up your teflon strip and need to replace it. but, it you change your blade housing to the through cut position (position 3), you should be able to use either the 45 degree or 60 degree blades. From my understanding, the differences in those two blades are mainly for the thickness of the materials, not so much the kiss vs through cut positions. We use the blue blade holder (we only have this one) - CB09UB for both the CB09UA 45 and 60 degree blades. (We use the 45 degree blades for most cutting - stickers, calendered/cast adhesive, and we use the 60 degree blade for cutting our thicker laminated floor graphics.) Hope this info helps!