I made exactly the same mistake as many others. I put C-stands in the bag and the yellow disc broke during transport over smooth office floors.
Thankfully, Thomann sent me a new bag.
The bag is extremely useful for lightweight tripods and other bulky accessories. I would recommend anyone who wants to buy an R8, R10 or R12 to order this bag at the same time. But be careful with heavy C-stand tripods. ;-)