G'Day Twin Silvers!!!!!!! Only help I can give is small grain related but as most of it come from this site as you know, it will still work!!!!! Third helical is compulsory!!!!!!!, extra helical on discharge end of cage, good Acc rollers, and all forward rasp bars!! you could get some black ones for the first couple of years just so you can fine tune the set up you want, and that would be the cheapest way to play with it. Hump kit if you want, and top chaffer third adjustment! That would be my start with new machine! Hope you have some fun with it! (lucky bugger!!!) Rolf