scale size board instructions?

Does anyone have instructions on how to make a scale sized board. I bought a 620 last year and have never been satified with it. Believe me, I spent hours (and I mean hours) trying to use what I saw on these posts, but it never turned out right. I think that if I don't do something (that is, make a better board) my interst in EF will wane. Any insight would be much appreciated. Thank You.