There is one thing you need to remember when you are creating tokens and such also, for a grid of 140x140 (scale of 2) -- your base unit for everything, becomes 140, instead of 70. So any API script you might use that depends on grid size, if it says 70, change it to 140. Additionally, with tokens, the scale is 140x1 (140x140), 140x2 (280x280), 140x3 (420x420), etc. For tokens, I generally make everything a size larger than I need, in case they need to be resized because of a spell or something like that. Granted, I make my own character/monster tokens, so it's a little easier that way, but still.