There was a post about this a while ago and someone her did a write-up on their site. You basically need to cut out an inch-high section of the stump where the bulb screws in. Then you epoxy the top part of the stump to the bottom one (minus the section you cut out) to make the stump shorter. Then you replace the bulbs with the Jap-spec (L-shaped) bulbs from $tillen.