A fabric covered structure such as for use as a gazebo or pavilion includes plural generally vertical support columns connected to roof beams which support a fabric roof. The stereoguide comprises first and second guide elements through which instruments are passed along an axis of insertion towards a target and a first clamp having a clamping position on the axis between the guide elements and the target. A baseband communication unit and a broadband communication unit are mounted on the circuit board, and at least one hybrid circuit is interposed between the filter and the baseband unit and broadband units. The ultra-hard material body can comprise a composite of separate ultra-hard material elements that each form different regions of the body, at least one of the regions being thermally stable.