I must say, I'm extremely disappointed with the DIY cubes from rubiks.com. The center caps do not stay in at all. I even tried hot glue, which just makes a mess for one thing, but it doesn't help. Any pressure or quick movement will eventually make the caps fall out. Also, the center pieces are larger than the rest of the pieces (unlike the store-bought rubik's brand cubes, in which all cubies are the same size), so it creates a lot of friction. The DIY are supposed to be smoother, I thought. I have to tighten the screws so tightly to prevent the thing from falling apart in my hands during a solve, that it becomes really tight, which is normally ok since it prevents jamming during finger flicks, but because the center cubies are larger, the friction it creates is insane, making it basically unusable for speed solving.
I have bought two DIYs frm rubiks.com, and they both have all these issues, yet, I hear people highly recommended them, so I must be missing something... How do you guys deal with these DIYs? As far as I can tell, the store boughts are better, with proper lube (and you don't have to assemble them, but you take the risk of getting a cube that's too tight, and you can't adjust it).