"damm you said too much now, what are the issues?" - nocomp
The Etherwave is really difficult to tune, though once you get it in tune it tends to stay there for a while. I owned one (a kit) and had a devil of a time getting it tuned initially. I've tuned two of them (one a Big Briar, one an Etherwave Plus) for another player here in NJ, and every time I do a tuning job it's a little different and challenging in some new stupid way. The tuning instructions provided by Moog, Inc. are less than worthless. Even though I use an oscilloscope and DMM to help guide me, I'm never really sure when I'm "done" tuning as it's a big mushy mess. And the tuning knob doesn't directly compensate for environmental capacitance changes, so you're forever removing the cover to tinker with the guts.
If you install the ESPE01 module or other "range extender" buffer board the bass end timbre goes to hell. If you don't install it the bass end of the field is smaller and less linear.
The antennas are sink / toilet plumbing tubing and connectors, I really dislike them.
There is no ESD protection or antenna insulation, so the pitch and volume oscillators can get zapped.
It's a difficult instrument to own if you want to keep it in tip-top shape. Be prepared for a very technical learning curve that you may never feel you've completely mastered. It's the best of the worst, the devil we know.