Just got mine today, It came pre-lubed and assembled, but I'm missing the red circular "opener" for stretching the centers.
I took it apartt anyway because I didn't quite trust the tension eveness of the cube. As I expected, the tensions are not in very even equilibrium. One of the center piece is so loose that the screw isn't even compresing the spring.
Assembling is actually quite hard, took me about 30 minutes for the first time (I usually takes 3 min for the normal YJ 4x4).
I have a couple tips for assembling the first cross (which is the hardest part). When you assemble the very first edge, push BOTH center frame to the right place and hold it with both of your hands. Put the edge center and edge piece together into a sandwitch before putting it in between the centers. With your pinky and ring finger holding the center frame in place, hold the sandwitch with the tripod formed between your thumb/middle/index and force it in between. It's kind of hard to describe it, you should mess around with it a little bit and find out the best posture of pushing it in. But the trick is to put together the sandwitch first.
For the second (adjasent) edge, you'd want to hold the edge center to the "unstable" center first, and then slide the edge piece in. This could be a bit tricky because the pieces have cynlidrical foots rather than the more stable spherical foots. After these two are in, take the other edge center and push it into the slot from the top. Once you got these two edges in, the rest are much easier. Go ahead and build the first 2x2 block from the bottom. When you get to the third hidden edge piece, put in the big edge first and slide the edge centers in. Having the first 2x2 block finish, you will now build a new independent edge next to the block. Also put in one edge center and one edge first and push the last edge center from the top, but one thing to note is that you should put in the edge center on the stable center side first, because when you push in the last edge center, if you push it on the pre-built side it might pop out the 2x2 block you first built. So it should be the one on the independent side that is pushed in in the end. Assemble the rest of the 3 2x2 blocks and the top layers should be fairly easy.
