Ya, I think the trimming issue is "what wheel are you using". My wheels are deep dish and like to pound the tire out of the well a bit. This makes for a tighter turn for the tire in the wells. I had some cutting to do. Trust me, I did not want to, but it was all plastic. No metal.
Just keep your wheels in mind. I did extremely minimal trimming when I had them mounted on my stock wheels. I know many folks didnt have to trim with them, but, for some reason or another, I had some minor rubbing.
Gary Noonan
'01 S/C VX / '18 Forester XT