I would go with the OEM CaseIH chaffer. We had a loewen adjustable for awhile, but the fact that it is lighter means that it is not as strong and it kept breaking in the middle of the back, even with all new bushings, etc. The tubing across the back of the OEM is approximately 1" x 2" x 3_16", while the loewen is only 1" x 1" x 1_8". Our Case chaffer is holding strong.