Really want to get a better rock scape in the 180 upgrade and get some arches and towers in the process. Plan is using some 1/2" Acrylic rod and drilling some holes in the rock and using the rod in the process. Where are you guys getting this rod from and who has the best price. Will 1/2" be enough to hold the rock or will it need top be bigger. It will be more to hold the rock in place once in position over holding all of its weight up.