The present invention relates to re-configurable signal processing modules in particular, although not exclusively, for wireless communications terminals. A grapple tooth bar mounting bracket is attached to the distal end of the guide arm where the grapple tooth bar positions within the grapple tooth bar mounting bracket. The platform support assembly has a slide tube movably engaged with the upright, one or more platform support arms mounted to the slide tube for supporting one or more platforms, and a lock for engagement with the upright to prevent downward movement of the slide tube. Improved efficiency can be achieved. A releasable connector extends through the housing.