Hello! I have heard that the silicon spray melts the plastic in a cube. IS this true? If it is, what do you recommend over that? Another question I have is this: right now I am working on the fridrich method and I have the F2L down,( even though I am very slow at it) and I have the first five or so algorithms of PLL down. (I'm saving OLL for last.) Should I get a speedcube now(right now I have a rubiks brand cube) or should I memrize the fridrich system first? and when I do get a speedcube, should it be a DIY or not? What exactly is the difference between a DIY and a normal speedcube besides the fact that you assemble a diy? Is the difference that you can adjust the tension on a diy and not on a normal speedcube? thnks