Hi I have a mothercare my3 chassis with a carrycot on it I got given, but to make it into a pram I think I need to get a seat unit, are parts sold separately am I right in thinking that my 3 and 4 parts compatible
No it's the same top/pram bit. m.youtube.com/watch?v=1lpyz76VXBM Watch from 3 minutes 20. It's for the roam which is the next one after the my3. But it should give you an idea how to do it. The metal bar should be used to make the seat bit. I think that's the only difference.