For CYCLES, first I (42Genius42) came up with a 165 which seemed not too bad for me – shared with Jammuu who quickly got it down to 158 after spotting that we could just swing the product to the output 2 cycles earlier than what I had based on the SUM solution (though the SUM solution we now have also manages to incorporate this swing) – after further instruction timing & refining dabbling, I got it down to 142… a suitable number ;-) so a great team effort here for Team Jammius42! The building takes longer than the tearing apart of the metal reagent, so it is hard to see how the LHS chamber can be more efficient. <Spoiler for if CYCLES are shown before SUMs> The RHS chamber here is almost identical to the one in our SUM solution – but with 2 arms and 1 bonder more in exchange for fewer cycles and different conduit positions.