I have found that accurately solo pouring the first few pounds of iron from a very full A20 crucible using a trolley to be challenging. 3/4 of the time I spill very little, but some times 2 or 3 pounds ends up dribbling off the mold. (Sometimes the results are hilarious as recently shown photos of a cast iron "mouse" demonstrated.) Most of the time I can take the easy way out and just fill my crucible to 3/4 and still pour the patterns I am doing. In the near future I will be pouring a pattern that will take about 55 pounds of metal. So, there will be little room for sloppiness and maximal tendency to slop given the full crucible. So, I have probably reinvented a long-ago-devised wheel, well funnel really. It will consist of an armature of bent and silver soldered 3/32" (editted from my initial report of 1/16---ooops)tig filler rod and some legs of scrap 1/2" square bar. The legs have reinforcing struts tigged to the base of the armature. Then I am going to form a cone liner of kaowool soaked in diluted sodium silicate. I doubt heat will transmit enough during the very short pour interval to break the 1200 deg silver solder joints. I think it has enough mass and is broad enough to have adequate stability. Time will tell on both of those points. I will be using the large plastic funnel shown in one of the photos to form the inside of the kaowool funnel. Are there other proven solutions out there for the guy pouring solo? I thought of a simple cone-shaped riser liner to be simply set on the mold, but was concerned it might tend to float if the least metal got under it while pouring and it might tip easily.