Mine has had the fertilizer box deleted and combined with the grain box. Makes for a lot of acres between fill ups. Don't have a close up of box mods, but pretty simple to do. I don't like using the front grass seed box on it as seed does not flow well through the long tubes to get seed out the back, but it works great for straight grain. Its a 21 run so makes short work of sewing grain.
hers the stand of oats that I got from it.