Quoted from swampfire:
Not sure why you'd say this. It's much easier to change out the drop targets once you've done this mod, and it has zero impact on how the game plays. I've made the game easier to work on for the next owner. Gottlieb fixed this design flaw (starting with Black Hole) by leaving that area open. See Clay's discussion here:
I agree. i made that mode myself and no problems at all.