On 30/04/2016 martym wrote:
>How thick are your ropes? That's going to be the clincher - having two
>thick ropes in your ATC. If you plan on regular threesomes - double ropes
>would be a great investment.
Decent guide plate devices are not an issue at all with belaying single ropes at the same time. I've never had issues with ropes <10.5mm. Though certainly some are better than others. I hear the DMM pivot is pretty good.
>Alternatively - what about taking two gri-gris?
You serious? Gri-Gris aren't reliable for locking up unless the brake strand is tended. Guide plates are far lighter, easier and safer for such a role.