I see the sticker saying it's for the L100, L200, and L300.......
Hideki said that he's sending a "collar" for it....
8/11/10: I received the new collar - the thing is VERY tall - similar to the new motor. New motor is taller than the previous blade motor and new collar is much taller than old collar. I installed, and even after cutting about 1/2 inch off the top of this collar, the blade is still very low to the ground (I can not push it any further up because of the top cover/shell.
So now I have an upgraded robot which cuts lower than before the upgrade....
Will have to contact the guys at Kyodo again...