How do you get even heat distribution when firing glass in the microwave kiln?

Firing the MagicFuse kiln on the microwave's food rotator tray produces better heat distribution inside the kiln than firing without the tray. However, in some microwaves the rotator tray jerks as it turns, moving glass pieces out of position. If this is a problem with your microwave, either uses a different microwave or remove the rotator tray and rollers from the microwave. If you cannot remove the rotator parts, then turn the rotator tray upside-down, and place 3 of the ½" ceramic posts that came with your kiln on the tray. If there is enough space, it may also be possible to remove the tray and place the posts in the bottom of the microwave near the rotator parts.