Purchased a 2013 preowned 7230. Rear sieve was changed out and rakes and seal were not installed with new sieve. Purchased rakes and seal. I'm thinking the seal is a joke. The holes in seal for sieve controls were in the wrong place, had to trim and patch holes. There are three holes in left for controls and two in the right. That leaves probably a 1/4 to a 1/3 of the space actually filled. Does this do anything for keeping air in and sending it up through the sieve?