.holygrail .colleft {
    left:230px;             /* Left column width + right column width */
}
.holygrail .col1wrap {
    right:0px;            /* Width of left column */
}
.holygrail .col1 {
    margin-left: 15px;         /* Centre column side padding */
}
.holygrail .col2 {
    display:none;            /* Width of the left-had side padding on the left column */
}
.holygrail .col3 {
    margin-right:15px;      /* Width of right column right-hand padding + left column left and right padding */
}