biggie here.  Ordinarily when you want to make two polymers in low TI, you bond them together and don't think very hard.  This is not allowed here, and in fact the only bricks one could make are useless bricks with quicksilver in them.  The quicksilver preparation in this solution is already really slick, it's everything else that feels inelegantly doubled.  I tried a bi-arm to pull away the monomers in fewer instructions than two basic arms, but the angles were really bad so it hurt more than it helped.  To make things just that little bit worse, the polymers kept coming out facing different directions, so I burn 2I just for the final orientation step.

Hopefully someone makes something that feels a little more slick.  I hope it doesn't use track though..