Like I said I have used the Quattro, with an X-1, for almost a year before laying my hands on the Explorer II. I took the modified shaft, modified for the X-1, off my Quattro and it is attached to the Exp II now. Looks like a Quattro/Exp II hybrid.
I have only gone out once with the Exp II (the snow is flying and the ground is frozen in Idaho), but since I primarily learned to use the Quattro via tones - I have found the Exp II not to difficult a leap.
In only about 6 hours of use, I absolutely have fallen in love with this Exp II - No longer am I having to wait for the thresh hold to reset, no longer am I getting bizarre behavior, no longer am I having to go excruciatingly slow in trashy areas, and I really like the fact that I can adjust almost any setting on the Explorer II!!!!
I have found the Explorer II to work better in the trashy area's with the stock coil than the Quattro did with the smaller 8 inch coil.
After 6 hours of use I can safely say that you can have my Exp II when you can pry it from my cold, dead fingers!!!!