Cloud Tower Rappel Beta?

If you are doing the standard Cloud Tower route and rappelling after the 7th pitch splitter corner can this be done with one 70m or is it mandatory to have two ropes to get down. Any rappel info would be appreciated. Thanks!

I was just up there and noticed with rope stretch you (probably) could get back down the last pitch to the belay ledge with a 70m. At the ledge there is a sling round a horn where you could do a short one to the big ledge.
We did rap with a 70m all the way down from there, though we did stop at a single bolt on the third one(you will see why). Not sure why there is only one bolt but it looked new and had a link on it.
Carefull on the last ones, looks like a few ropes have been chewed up there over the years.