I lost the main bamboo parts of the cart. :'/ During hitchhiking I probably left the two largest pieces next to the road. Now I'm walking again as I started this trip with only the wheel and brace strapped to my backpack.
I might rebuild another version during this trip. It all depends on what building materials come my way. But for now I threw the remaining bamboo parts away as well. Lessening the weight of my pack. It is a letting go without feeling bad about it.
For now lightweight backpacking it is!