I use the R/R R10, but with a second tier shelf, so that no significant weight is on my KB case. It is kind of a toss up between the shelf and a heavy flight case. The difference is that I always have to lug my keyboard, but don't always have to use my shelf. My setup is similar to Bill's.
Bernie
_________________________
pa4X 76 ,SX900, Audya 76,Yamaha S970 , vArranger, Hammond SK1, Ketron SD40, Centerpoint Space Station, Bose compact