Good morning Ron! I had the same problems with my thighs. To control the thighs, I put front straps that are connected from the thighs to the abs plate. This stopped it from swinging around and keeping it centered to the knee. Also, I had trimmed them at the top and copied the movie scene pics like this:
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I removed 1/4" (quarter inch) at a time until I found it comfortable to walk around. And yes, I had to trim the groin area to make it more comfortable. I didn't like my armor thighs snagging the family jewels. But seriously...take your time. We are only the few working with NE armor and someday we will be able to help other NE owners.
Cheers,
Walter