I've had similar success when I ran hustler coils, it seemed I could work anything I could hear. Something you might try for 20M is to use a 15M coil and resonate it with a longer whip (about 4ft). I ran this setup a lot and it worked very well. I used the 15M coil and long whips for 17 and 20, so I got 3 bands for the price of one 15M coil.
Mark K5LXP
Albuquerque, NM
k5lxp@arrl.net