Tommy Williamson had problems getting his D|Gear Universal Lens Gear to stay on the Canon 50mm F/1.8 lens. Who wouldn't? That focus ring is pretty slim. His solution was to dip the tips of the spokes in Plasti-Dip (normally used to coat the handles of tools). The Plasti-Dip is some very durable stuff, and comes in a variety of colors. [Thanks Tommy] The Black on Black looks invisible and keeps the unit looking the same. If you ask me, this should be something offered coming right from the factory. Pretty simple idea, but seems to make a world of difference to prevent the spokes from slipping out.