RC Williams Company Bass Buggie

I have had this buggy for less than a year and have used it fairly extensively. It is very useful. I have met a couple of problems however. No instructions come with it so you'd think it's very straightforward but no and this has led to some unneeded wear and a few unwanted slaloms. You need to adjust the bands carefully to make sure the bass runs straight (this takes quite a lot of messing) and that the wheels are on the lowest part of the bass given the angle that it's running at. I used it out of the box without really checking this and this led to one of the bands scraping on the ground and wearing a bit. I'm also concerned that the wheels are wearing out rather quickly. This buggy is very expensive for what it is, I feel, but I suppose it has to be imported from the US. I'm concerned about the durability of the elastic strap that goes around the neck as it needs to be fairly tight to hold the bass when moving. I have watched the maker's video and he makes it look very simple - but he is demonstrating it on a smooth floor and I need it to walk my bass on the pavement or the side of the road. The wheels (which are solid and not pneumatic) are showing signs of wear too. Crossing roads is made more perilous because of the kerb height - you have to lift the buggy onto the pavement. Walking along a pavement which has rain water scooped drains across it can also be a bit of a challenge.
However, there is no alternative except carrying the bass on your back and it is relatively easy to use and it does the job.