I realised it would be a good design, size and shape for two small halves. The aluminium chequer plate is mostly cosmetic, as I'll have loads of weight left even as a cluster, but also provide a bit more protection, albeit not much. Mainly, though the shell I bought (while working a treat for construction) has quite a few marks on it, and sandpaper isn't cutting it. The only accessible way to smoother it out is with rasp, but that still make marks and shaves away at the HDPE. Aluminium chequer plate is light, cheap, easy to work with and (in my eyes) beautiful.