Ok...I had some time today and re-installed my antenna in the new, permanent location again. At first it was the same result, so I went back with the RCA preamp (TVPRAMP1Z) that I was using at the old location instead of the Kitztech and low and behold I started seeing some VHF...only KVIE though, no KXTV.
With this info I went ahead and installed a slightly taller mast...roughly 4-5-feet taller and there it was, all the channels including KXTV without any dropout (so far).
Still hard to believe how hit or miss the signal is on my roof...and the RCA preamp ended up working better than the Kitztech in my situation.
Whatever works for you. There's no reason I can see why the RCA should outperform the Kitztech. I measured each on the bench and the RCA is not better in any way that counts. 3rd order intermods are about the same on VHF but far worse on UHF. The Kitztech noise figure is far better, especially on VHF. The Kitztech gain is higher on VHF than the RCA but lower on UHF.