Bill,
I lubed mine with silicone grease that I use for fishing reels--it works just fine. And, I've only had to lube it once since I purchased it more than 5 years ago.
As for creating a performance cart, a couple guys have done this using the R-10 and R-12. Essentially, everything was anchored in place using Industrial Strength Velcro and bungee cords. In each case that I'm familiar with, the speakers were placed on each side of the cart, while the keyboard was placed on a top shelf. The rigs were moved in and out of vans fitted with hydraulic lifts for wheelchairs.
Some of the guys were quite creative and covered the front of the keyboard and everything beneath it with a sign made of plastic-coated fabric and professionally lettered. The sign doubled as a cover while the rig was stored in the van, and also served as protection on rainy days.
Cheers,
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.)