Though it's a response to the last post rather than the original question, it sounds as if the quality control has slipped on the E'Pros trundling off the assembly line. There are a lot of unhappy customers out there, as evidenced by comments similar to the above in other forums. I was with a gentleman yesterday, engineer and electronics guy, who's been playing electronic music for a long time. He has been seeing these posts about the E'Pros woes, and he told me that in the old days, he would actually drive to Ashville and knock on the door. Bob Moog himself would fix your synth while you waited. There's been a considerable amount of text elsewhere devoted to reminding people that Moog Music has just undergone the loss of its namesake as well as transitioning into another physical plant. And while I agree that some degree of slack should be cut, it's also clear that the overall attention to the integrity of the units they send out the door is being compromised.
Either way, if someone is just starting out on a theremin, it's far more economical and prudent to purchase a standard Etherwave or other model theremin with a modest price tag. If you were taking up the violin, you'd never rush right out a purchase a Stradivarius. You'd buy something serviceable and work with it to determine whether you've got the facility, the drive and committment to warrant getting the Big Bucks instrument.
Anyway, I'm glad to see other posts attesting to the need for a unique type of body awareness when approaching the theremin. Gaining such awareness versus doing technical exercises such as working with a score, practicing intervals, fingering techniques, etc., is hardly an "either/or" proposition. ALL are important and invaluable.
Fianally, yesterday, while with the aforementioned gentleman and working on a project together, we were visited by a friend of his who's never seen a theremin up close nor ever tried one. He asked if he might have a short lesson. When teaching, I work in "digestible" units of ten to fifteen minutes, have students to take a break, then introduce another unit (or continue with the same one, depending upon the results). Once again, I can attest to the fact that this instrument is far from impossible to play. I introduced one short unit, then I used precisely the steps outlined earlier. Within twenty minutes the friend was playin a passable Mary Had a Little Lamb and Happy Birthday. Nothing that would be for public consumption, but he was hitting the pitches, articulating the notes in a very basic way, AND even embellishing the melody a bit on his own, just because he wanted to try to. He was ecstatic -- decided he's going to learn how to play.