Never found the need for an adjustable one myself.
I've found that "automatic" self adjustment takes place as I shave. As in gently varying the angle of the blade to the face and the pressure as you shave to accommodate the varying bristle characteristics across the face. But subconsciously, like.
I use a gilette flare tip rocket. lovely.
( blaireau69 , the Cumbrian Travis Bickle., Tue 9 Nov 2010, 10:57, Reply)