I'm well aware that Eagles Nest is considered the Mt. Everest of cave diving. While I have IANTD Technical Cave, I have no desire to do a deeper penetration into Eagles Nest. I would like to see the entrance room (aka The Ballroom) by dropping through the entrance shafts to the top of the debris mound. Have you done it? If so, is there a common tie off point for a primary reel in the open water portion of the sinkhole? How wide are the entrance shafts? Do they allow visible light into the entrance room?