Sold birdview in the mid 80's....never saw even any literature on that oddbal dish...but, I think they'd gone pretty "mainstream" by then. It wasn't til near the end of their company existence that the systems were modified for non-birdview IRD's by changing the LNB's (or very early LNA's) to what they called the "high block" units, and the old potentiometer positioner sensor to the reed-switch kit. But, they ALWAYS in my era had electronic horizontal to vertical switching, so no relay "clicking" from the receiver, unlike Houston Tracker, STS, and almost every other! BV was certainly a great company. I'm so glad to have (2) operating dishes...always looking for more. (and installing a 3rd for a new FTA fan very soon!!)