Hi,
How do you fit everything in a box? Not including trolley I'm guessing? That's a great idea as my boot is soaked from 6 months of drips. Do you use a car or van?
I've been using a diy trolley since september, it's great! Off the top of my head, use tubing instead of hosing(saves with weight) and use metal hose connectors instead of plastic(less leaking).