Zebra midges

Is is possible to have too many zebra midges?  From #16 to #22, from black to rust to brown to red to tan. I have a whole box dedicated to these simple little flies and I've probably caught more trout on these than any other fly.

My favorite are with a tungsten bead, to help get these down to the bottom quickly.  It seems finding the bottom is where I catch fish with a zebra.  Your mileage may vary.  It also helps when fishing a tandem, with a Copper John or Pheasant Tail as the first fly, and a zebra hanging below it.  Helps pull the entire rig down into the water column.