Ours had the rectangular cutouts, to the brackets are designed to fit that.
However, the squadron pro lights are just a bit taller than that rectangular cutout, so you need to snip/trim/cut/file the rectangle open a bit larger.
Originally Posted by jliltd
So if we have an RV3B aircraft without any landing light and wanted to use one of these Baja Squadron units, I would also have to buy an install/lens kit. I couldn't find any light kit at Van's Aircraft for the RV3 wing. However, I do see that Duckworks Aviation has RV3 "Lampless Installation" kits. So which Duckworks type fits the Baja light best for an RV-3B? Square cutout? Circular cutout? Blank?