I have a neighbor who wants to know if I could combine some oats for him, hard to find someone who will. I can buy a pickup head for not a lot of money. I have both a TR86 and a TR70, which would work better since the 86 has the S3 rotors and the 70 has the standard rotors? Never did oats before, and he wants to know ASAP so he can chop the crop if he needs to. Thanks!