Hi! I have a VW Gatcombe which comfortably accommodates 2 adults but has enough room on top for two small children, I would say. Last w.e my son went away with his partner and two very young kids, just for a weekend, and the load apparently was up to the max, and he said he could hear the back wheel rubbing on the wheel arch. He said he hadnt taken an extraordinary load with them though! So, I've been advised to buy supports for the existing suspension coils because I cant get the stronger ones fitted (not available). Can anyone comment on this? Are they effective or a waste of money? Thanks!