the long awaited sequel to "who needs good build order", now with track loops in sum! also known as "NEW SOLUTION 1 (COPY) (COPY) (COPY)", derived from my 15th solution, "NEW SOLUTION 1".

the general concept is based on the slow pipeline of my cycles solve. originally there was only one arm on the left, but that made the whole thing *too* slow (and here i thought cycles was an afterthought for sum!). like so slow you'd get bored watching it. so it underwent binary fission and its a happy couple }:3.