You can get by for 500 acres with concave inserts for the round bar,sample wont be the cleanest,get extra quick attach kits for inserts and try moving them between 1st and second concave as the return dumps above the second and needs re thrashed,leave one inthe very front,I think this will work for what you need.I have run sts for 4 years,some advice from guys that run them one season and didnt learn how to set take with apinch of salt.