Simplified Crown. The Cut-N-Crown System features a plastic jig that replicates a molding’s spring angle so that you can cut both sides of a miter without resetting the saw. As long as the miter setting is spot-on, you simply reverse the jig and flip over the crown and you get a perfectly matched miter joint even on an inside corner, says the maker. A deluxe kit – three jigs (for 38-, 45-, and 52-degree spring angles), an angle finder, and roller guides to support long moldings – costs $200. Cut-N-Crown, 303/646-2029, cutncrown.com.