I got the metal clips and great instructions today. This vendor really goes out of his way to make things easy for the customer!
Based on the excellent install instructions, I started at the 1/8th recommended gap and I adjusted the metal clip down barely 1mm at a time until I found the optimal snug fit. If you push the clip too far down, then it doesn't snap into place as securely. If you don't push the clip down far enough, then you get a tiny gap where the side marker fits a bit loose against the fender.
If you are anal like me, I would recommend taking your time to find that optimal snug fit. Mine ended up still being in the 2-3mm gap range.
FYI - After I got the new metal clips in the mail today, I decided to just try and take the metal clips off the orange OEM side markers just for the heck of it. To my surprise, they popped off incredibly easy. All I did was take my index finger and lift up on the end of the metal clip, and the thing just popped out without much effort. I did it again on the 2nd side marker, and it also popped off just as easily without any damage whatsoever. I take no responsibility if yours don't come off as easily as mine, but I just thought I'd share how easy it was for me.
Excellent vendor product! Once you get these, you will definitely want a pair to match in the rear :biggrin: