I have used Macs, Snyders and Howell Sheetmetal for my projects. I have purchased cowl panels, rear fender well patches, rear quarter patches behind the door, rear panel below the decklid and bottom door patches and a door skin. I have not noticed any difference in quality all seem to work fine with minor work, with the exception of the rear quarter patches ( you have to slice and dice them to get them to fit. I bought a decklid skin from Howell for 110 bucks. I am awaiting the inner structure from Brookville.