I needed a way to level the original fender in horizontal and vertical planes so I just made a quick stand out of some scrap ply wood and shimmed the bottom till I got it leveled.
Leveling in the vertical plane was not very positive. There are not many straight lines on this panel. The only straight vertical line is a very small peak along the back edge between the bumper and the tail light. It's not much but it's all I have to work with.
The only straight line in the horizontal plane is the series of bolt holes where the body side moldings attach. If you look close you can see the laser line along the edge of the tape.
Since I modified the shape on the edge of the deck, I needed to make a sweep that would match the shape and location of that change. I have it clamped to the mounting flange of the fender. I also have some 1" spacers between the flange and the sweep to give me the additional inch of width for tire clearance. I am making a lot of changes from the original fender and it will be difficult to make the stations. I will probably have to rough them in, then mount them to the buck and fair them in by eye. This was the main reason I want to make one buck that can be reversed to make it work for the right and left fenders.