My case has a plywood shell, doesn't weight more than 10 pounds, and the keyboard is fully protected unless you decide to stand on the case. On top of the keyboard case is the X-stand (just over 20 pounds), fan (3-pounds) and Bose extension tubes (4-pounds) - no problems! The bottom shelf holds the Bose L1 Compact, custom console, accessory bag, and there's room left over for anything else. My folding seat (26-pounds) hangs on one of the R-10 handles and anchors the X-stand in place so nothing on top can shift around if I have to go up or down a handicap ramp.
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)