Used the setup in my original post last night, and it worked great. Really pleased with it, and looking forward to balcony clamping whenever possible. For anyone that stumbles on this in the future, I highly recommend it for a fairly easy clamp setup.
Sadly, I blew a completely awesome spot (DFC, front row of the balcony @ Royal Oak Music Theater for Trey) by screwing up a setting on my D50. I had a backup zoom h2n going that sounds pretty good, but was really excited to hear my regular setup from that spot. Oh well...