Just wondered what methods people favour for quickly backing up one bolt to another - where you're running everything off one bolt, rather than using a sling/cordelette to equalise to a central loop.
I'm curious because I came by a cheap Grivel Vlad (combo crab/rigging plate), and I'm thinking of trying it on some big sport routes (2 climbers, block leading more often than not). It seems to me that the quickest and most convenient way to use it is simply to clip it to one bolt, run everything from that, and connect the two bolts (if there's no chain) for backup.
I saw some pics of the Vlad used this way, but the backup was a dyneema sling clipped into the main compartment of the Vlad (i.e. next to the bolt hanger), which didn't look great, as it looked like the sling could get mashed by the edges of the bolt hanger if the Vlad was loaded. The other obvious solution is a second crab in the hanger, but I've heard some negative opinions about that.