The trb-1 is still the best echo board out there and there should be no issues with the repeatability of a transmission if you've properly set it internally as per the instructions.i have used the trb-x2 board with no problems. i like digital echo. i never liked the trb-1. i always thought it was more a reverb board than echo. i haven't tried the skythumper echo, yet. if it's as good as thier mics, i'm sure it will be a hit.