I have an M9 and M5. Use them in my A & B rigs. Delay/Echo has eluded me. I don't guess I have the patience. I play in a cover band and we are doing Her Strut by Bob Seger. I know Pete Carr played lead on the tune and supposedly used an Echoplex. I can't seem to get either EchoPlex model to do that repeat after each riff. Any ideas as to achieve that? Thanx in advance for helping this old man.