Hi ladies. Looking for some advice. I have Uppababy Vista which I loved with my first. When no. 2 arrived I got adaptors so it could take bassinet and toddler seat. Baby is approaching 6 months old so now wondering if i get the rumble seat or a different double/ tandem altogether? Is the uppababy heavy and clumsy when rumble seat is added? Rumble seat is €250 and I can't find a 2nd hand one so wondering is it worth the investment. Toddler is 2 yr 8 months now.