Making Glossy Floors tutorial

It is a pretty good tutorial, but if you don't know building terminology, don't buy this, because the first sentence of instructions will go right over your head! I know only a little to get me in trouble, so I will have to figure it out piece by piece. The makers of this tutorial are just taking for granted that you know what they mean automatically when they say things like, "hollow 95" and "deduct 5% from original size, which equals 14.250 for X and Z". And that is just the start of the tutorial. Not saying that this is NOT a good one, just saying that you'd better know building beforehand!!