Can anyone give me some pointers on fine tuning a slimline? My signal levels on the 101, 110, and 119 are all low to high 90's, but on the 99 and 103 they are high 60's to high 70's. It seems that since the other signals are good it should only take a small adjustment to get the 99 and 103 signals up. I get some pixelation on the new HD channels on both the HR20 and H21. Zip code is 46538. I would really like to get these numbers higer since our HD locals should show up very soon. Thanks in advance.