Thanks for the reply. I had already ordered a loewen sieve from Worthington Ag Parts ($275) when I got your message. I was very impressed with the sieve I received from loewen (quality construction, excellent fit). I am getting a very clean alfalfa seed sample. I live in SW South Dakota, which was very dry this summer. Alfalfa seed is doing well (300lbs_acre) but is not worth much ($0.35_lb for common seed).