arm 18 is the base of all the solve, it rotates 1/3 of the output 8r. It looks possible to do it in 6-7r by not extending/retrecting arm 18, but all the rest of the solve is barely possible at 8r(arm 3 and 8).
(it fells like that rotating the output from inside is faster than pivoting it from outside)
All the other arms were made after 18 to deliver the monomer at 8r.
Originally silver and quicksilver came from the same conduit, but the monomer want them coming from oposite sides, so I decided to put quicksilver at the vitae chamber an use the conduit to swap quicksilver and fire AT THE SAME CYCLE(look at arm 8) thas saved some needed space from the silver chamber.

List of coments about arms:
10: Arm 10 could do the job of 11 at a worse latency, so 11 exist because there was space.
9:It doesn't need to do half of those grab push but I find it funny.
1&2: They used tobe an hexarm but ir took too much space, also it allows arm 2 to grab the input with 1 less latency.
12&13:arm 12con only output mors at 18r but it needed to do it at 2*8r = 16r arm 13 barely saved this solve.