DS1 is 3.5 and too big for our Out 'N' About double. I've bought a Lascal for our Maclaren Techno XT but I just can't walk properly (DS1 just loves the buggy board!). Stroller handles are too far away and I can't stride out properly, so I usually end up walking to the side. It's giving me a sore back.
I have my eyes on a Baby Jogger single stroller.......... but are all buggy boards not really for going out for a proper walk?