I just bought an 18-frame extractor from Brushy Mt. They also make the same model in a 9-frame version. They told me they had to trim the bottom slots with a pocket knife for me before it left the factory so the plastic frames would fit. They said it was no big deal and they did it all the time on request. If I were you, I'd ask the vendor to make it right before they ship it to you. Hope that helps. Good luck!