I too am sans P90's at the moment.
whats the difference with p-100s?
P-100s have hum cancelling qualities, if I recall correctly. I think there is a second coil in the pickup like in a humbucker, but it retains the sonic qualities of a P-90. Or at least close to the sound of a P-90. Many people dislike or hate P-100s.
I take it you're one of those guys