Doug must be thinking about the standard ground level sleeve. Those don't work with a portable basket because the pole on the basket isn't long enough. For a portable basket you need exactly what Jack it talking about. At USM we accomplished this by getting the maintenance guys (Tony Todd) to find some steel/galvanized pipe they had leftover from other projects that was the right size for our Lightning DB5s. They cut it to length and I drilled the holes and set the pins in concrete.