
Pretty interesting puzzle that got me pretty frustrated because I couldn't manage to get min rate and therefore getting close to min cycles. I had to settle for 17 rate instead of min rate (14) even though the left chamber layout supports min rate. To get min rate instead of passing 1 metal of each kind through each conduit the chamber doesn't output gold/iron and outputs 3 purified inputs + 1 non-purified input through each conduit instead. This min rate would force the output chamber to do the purification but unfortunately, I couldn't find an assembly chamber that managed to do that. I am confident someone else did manage to find a proper right chamber with purification. I also didn't pursue trying to squeeze a purifier in the output chamber and to speed up the whole solution by mixing 14-rate and 17-rate products to reduce latency, using the downtime in the arms on the right chamber to purify some of the metals for the 14-rate products.

PS: I would have loved to finish my sum layout but didn't get the time, it was just the same left chamber but with three length 3 arms on the trackloops and making the trackloops 1 tile longer. My guess is sum in this puzzle is going to rely on focusing on cycles as each output requires 7 inputs with lots of purification involved. This puzzle reminded me of purified gold sum in a way.