NWMR-Uppababy Vista Rumble seat?

djm31012

Has anyone with an UB used the rumble to convert to a double stroller. In theory it sounds like a great idea, but when I look at pictures, it looks like the 2nd set is super close to the first seat, especially when you have the infant sit clipped in there, I think DS would get claustraphobic! Just wondering if anyone else has used it that way. I would LOVE to not buy another double until they are bigger.