Not so much a problem using preexisting ramps as it is claiming it will be the most blinged out game in the history of pinball. If you're using a preexisting ramp compromises in the design will be necessary.
People looking for the cheapest beer are usually just looking to get wasted. I'm not saying that's John's angle, maybe he's just thrifty. Some people like rolling rock, Coors and Miller genital draft. There's an ass for every seat!