The extenders are the little round disks that came with the board. They just fit on the board's feet to raise it up a bit--they are not very snug, but work perfectly fine once they are on. They should probably be used on all kinds of carpet (even though it says they are for thicker carpets).
part of the difference in weights can be different surfaces.
(aka Mommy_T) Central US
Zahari Skyhorn, Elite Ranger Half-Elf, Corinthium
Happiness is a butterfly, which when pursued, is always just beyond your grasp, but which, if you will sit down quietly, may alight upon you. ~Nathaniel Hawthorne
| current weight: 267.2