pro tip: the castors / wheels included with the PC-D8000 are pathetic for such a hi-end case, LL should only supply with poly-urethane castors. I work as a timber floor installer & can tell you that those cheap nasty plastic ones easily scratch timber floors!

This is my collection:

https://www.dropbox.com/s/cfbjk3en53gdeep/P1000170.JPG

look closely at the wheels I have installed on many of my cases.. these are the ones LL should be supplying with their bigger cases, such as the D8000