Vitress hair coat cuticle (the one in transparent bottles with clear liquid) is a nice lubricant, it's like maru lube.You can find this in supermarkets. For traxxas, you can find RC car hobby shops and ask them if they have shock oil. (I'm not sure of the viscosity though)
Just got this cube. It is very light compared to my yulong, it has effortless turning, especially the m slices , they used to be a pain but now it's not! At first it was a bit flimsy but after tightening it a bit, the flimsiness went away. My new main!