Money??? We don't need no stinkin' money.
For a couple cents worth of filament, I can 3D print spacers to go between the Heil reflectors and the bodies that will create a greater difference in sound than $$$ cables.
As it is, I just push the reflectors in tight and if you try to pull them back out a hair (and I do mean a hair) you don't necessarily get the spacing consistent top to bottom and between the left and right speaker. This will take care of that.
And if I don't like what the spacing does, it's only a couple cents more to try it again at a bit different distance.
For me, this is what makes it a hobby as well as a source of relaxation.