I have inherited a HP 10636 G2 42U rack and I'm trying to work out the stabilising feet. Here's a photo of one of the corners (the castor is visible behind the metal bracket): http://imgur.com/a/LLP4K
The feet only unscrew about half way down to the floor so I'm assuming that I'm missing a piece. I've checked the user manual and I can't find any references to stabilising feet, nor can I find any info online.
Am I missing some equipment?