The BMBF works great, but I've found an even simpler solution. If you have the SS Perlicks, a length of 3/16" beverage line will jam tight into the spout if you cut it on an angle. Cut the other end at a 45, slide on the drilled #2 stopper, and you're ready to go. Just hold the stopper in place and whack the tap open, then you can throttle the beer flow by the amount of gas you let bypass the stopper.
When I used the BMBF, I'd have to depressurize the keg down to 2 or 3 psi or I'd end up with half a bottle of foam before the counterpressure effect kicked in. This way, you're already getting foam free beer if your lines are balanced, so you don't have to mess with the pressures. Plus, the smaller diameter line barely drips at all when moving from bottle to bottle whereas I'd lose over half of the beer in the racking cane when using that design.