right so I'm really excited my c & c grid are on there way, iv ordered from b n q sdo have 23 grids to play with lol and a space of roughly 39 by 69 inchs to fit it all in. how would people recommend i set it all out, one floor, 2 floors? how do people find they work best, should i order another set of these or will 23 be enough to start with? and as for correx, how much will i need roughly,