Since the issue on VHF is solved, I don't feel the HLSJ or any attenuation is necessary. It is nearly impossible to overload without amplification. You would need to be less than 5 miles from transmitters (except FM) to experience overload in most instances.
The problem channels are all UHF now, so I suggest moving the antenna up/down a few inches at a time to find a sweet spot that works best for the remaining channels. It may take a bit of experimentation, but I find this quite effective time after time, especially when multipath is present.
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