Heya, Kimmy,

The Lascal Buggy Board Maxi is actually compatible with many more brands and models than their site states (I mean, they state only those they tried on, but there are many more being released pretty much every month). The Lascal sibling rides (and also the Bumprider) I actually consider one of the best compatible kid board on the market(s), which means they will actually for almost every pram that doesn't have a crazy weird frame (as weird, I mean something in the likes of a Stokke Xplory, and I also know that the Cybex Mios is not the most buggy-board friendly).

Another thing to consider is that you need sturdy-ish frame even of a compact, light pushchair otherwise it will seem cray flimsy after a few days to weeks with a buggy board. If you love your Cruz, I would actually suggest he Uppababy Minu as the smallest doable model here. I would also consider something like the Oyster Zero (perhaps not the Zero Gravity, though, as I would be scared the strain might do something to the folding mechanism/joints), and if it is not too heavy/bi for you, the Gesslein S4 or the ABC Design Avus would probably hold reasonably well with a sibling skate.

If small, like really small, even if not plane-friendly, is the most important, the Minu will most probably be your best bet.