Okay, I took a set of front turn signal lights that Saxon was kind enough to give me and cut out the center of the cap for an LED tail light conversion for my CJ-5. Here's a picture of what DP had done with his M715 as posted in another thread:
Now, here's what I am left with after using a 4" hole saw on a drill press:
Note that mine seems to be cut out without any "flange" left to hold in the LED light. DP, is this pretty much what you ended up with?
There's a ring on the inside that's exactly 4 inches in diameter. The hole saw fit exactly inside that. Yet from the outside, it looks like yours has more of a break-over. A lip that would hold the light in place. On mine, it looks like I will have to glue my LED light in because there's no lip to hold it in. Did I do something different? The front turn signal cover can't be a different size than the tail lights you used...could it?