It's a major pita, but I "have" fixed a PC Quad jet before, you have to remove the manifolds and use some 1/4" or 5/16" flat stock to push the manifolds back, I might even use 1/2" the next time I do it and machine a 15 degree angle into one side, then drill the bolt holes, this Mimics a Greenhorn wand's angle and allows room for the jet extensions, doing both and adding wider spray jets fixes the pile distortion and streaking issues, but it's work by the time it;s all done, cause you have to bend the hell out of the U shaped horsehoe SS lines feeding the jets, and you will have some slack in the soft solution line.
I just boxed up two more 14" greenhorns today.