[Jon]

Thanks for the information.
I had thought about that option too. I could drop a weighted line down the hole and tie it off on the surface. I would just wear my standard ice harness. The harness has a 1-2 meter line on it that is tied into a carabiner. I could always unclip if I needed to.
This way I could just work my way up and down the rope with some sense of security.

Jon