Metal flare locating question... Options

[bossboy302]

Sorry if asked tons of times before...
How have you located the height of the AA metal GT flares? The lip at the bottom (which needs trimming)....to what area is this aligned with? The stock lower fender has several bends and bevels, the new flare is flat. I'll try and post a picture to help explain my question, but those of you who have done flares probably get what I'm asking here...(?)

Thanks

[Shivers]

If you can zoom in, I clamped a piece of angle iron to the middle of the stock opening. In this pic the flare is just hanging on it. This put the bottom where it needed to be. Once I had that I cut the original sheet metal at the bottom so I could push it in and tack weld the bottoms of the flare in place. I used a cutoff wheel and went about 6” at a time around the flare cutting the stock sheet metal. I reached in and bent the metal I just cut a little bit, just enough to tack the flare in place. I’d go 6” on one side and then 6” on the other side. I hope this makes sense, I’ve got covid again and I’m sick as a dog.