SafeTech Double Jogging Stroller "rollerblade" Questions

shakes when going fast I had an accident while rollerblading with the stoller and now it shakes whenever I go faster than a walk. I t ook it to a bicycle repair shop and they didn't find anything ...

My stroller needs a new part I have a quinny freetsyle 3xl and the front wheel suspension has broken, this is the piece that helps the front wheel pivot from side to side. I won this stroller in a ...