Namaste, We got a little better contact with the radio call recently and the exchange-they have two oxygen bottles for their climb-they have now made a successful change to leave the bottle they partially used at the Balcony there and if necessary will use that after they go to the summit if there's more in the tank than the one they were using. Sounds like the weather is really very nice, not much wind, which is why I thought we were having difficulty communicating last time, very nice to hear. Their next push is to get to the south summit, that will take anywhere from a couple to a few hours, so we will try to not  bug them even though we want to, and will let him check in from their next point and I will definitely keep you posted.