I have a 4-36 cornhead that I was planning to cut down to a 4 row 30". I have a 1620 and will be close to my other rows or if I get into mud I know I'll have trouble. My idea is to add an extra row and convert my cornhead to a 5 row 30" head. I'm looking for anyone who has a complete row unit for sale and the tin for one row. My head is a 1000 series but a 900 series will work also. Any helpful hints would be appreciated.