Now wate a minute Ratman! I own both the original 8 inch or (whatever it is Quatro coil), but I bought a 5 inch excellerator from Kellyco, and I'll tell you for sure that my Quatro can seperate trash, like night and day better with that smaller coil. I know it takes more swings to cover the same ammount of ground as the bigger coil, but it definitly separates the trash better, and whether it's because it recovers faster (computer wise) or not, all I know is that it DEFINITLY, separates the trash better. My feeling on this, and it's only my own thoughts here, is that because the 5" is a smaller coil, it "catches" the object quicker, and identifies it, then moves on to the next object or "target" much quicker and accuratly than the bigger coil. In my eyes, it separates the different objects "underground", more accuratly and distintly, than the bigger coil. Marc Trainor.