Crown Control

Does the Crown have to sit flush to the angle of the shelf?

The crown does NOT have to sit flush to the angle of the shelf, so any angle STEEPER than the 53 that it is molded at would be easy to install still, simply by adjusting the shelf height properly, and then tacking the crown molding up flush to ceiling and wall, so long as the height distance from ceiling to crown control shelf is set properly, and the crown does not change width, the angle will HAVE to be perfect when it is tacked.