Well the third times the charm. When I first received the amp I was getting a kind of vocal distortion when playing certain albums. Maybe clipping, although the meters did not indicate that. Probably just a handshake problem with my Modwright preamp. Anyway, Steve was great and he finally got it all sorted out with a stepped attenuator with which I just reduce the gain a couple of notches and viola!
How does my Rachel with Vcaps sound? Fantastic! It really has a vibrant and lively flow to the music. I can see where people use "immediacy" to describe the sound of SETs. There is enough dynamic headroom with my Zu Omen Definitions and it has beautiful tone. I'm sure it will get better and better with break in, but I am very pleased at the moment.
Thanks to everyone at Decware for being patient and taking the extra time to make my purchase work in my system!