I've made several more stones. I can't say the exact weights, as I totaled my scale. For mixing the cement, I used a cheap (free after rebate) tarp and the Cretesheet method. See the video on there site. I couldn't find the product locally, or I probably would purchase it. The tarp works fine, but has torn after 2 uses and leaks. I put a wheelbawl top under it to keep the leak from making a real mess.