Hi all, I have 20-month old twins, and expecting number three in May (twins will be 2.5). Any advice on buggy set-up? We currently have a Mountain Buggy Duet, and I'm imagining some combo of baby in carrier, twins in buggy, or baby in bassinet, one twin in buggy seat, one on buggy board. Or are there any pieces of kit I'm missing? Any recommendations for buggy boards with the MB?