I implemented SUM on time but did not optimize it, so ignore my cycles solve PS comment. The last part of the instruction tape feels clunky but I didn't find a way to fix it. I wouldn't be surprised at a winning SUM around 500. The ordering of the metals can probably be swapped so everything can be built with less I and less track. Because each puzzle requires so many purifications the heavy cost and low cycles seem justified, I tried using hexarms but didn't find anything worthwhile.