This is an experimental key, I wanted to test out various ways of handling these new magnets, in this key one of the magnets is fixed vertically to a rotating disk with a turnkey tightener, the gap adjustment is another disk but the centre hole is offset and so by rotating the disk the gap is adjusted, the gap also being locked in place by a similar tightener, all this weight on the front of the key does make it a bit front heavy but the rear mounted sprung contacts counter this heavy feel a bit, its a real "Brass pounder" quite low slung, needs the usual finishing