Hate to say it, but a) grass field issue beat to death, just search the forum for some samples, and b) the articles you do find will tell you if you want to fly off grass, you don't want a Cozy/Long/Berkut/Canardy lookin' thing. There are far better air frames if grass flying is a high priority (think RV-x ... 10, I guess, if you want 4 seats).