Writing notes (and title) for this is hard. The triangle translation on a tribonder is a confidence-inspiring motif, but when you see it it's so obvious as the bonds in touchstone are simply just tribonder shaped. This means quite likely many players could be using this motif and I have little idea how the pileup will look like.

Other than the bonding pattern, the key thing is how to help arm 3 to do storage. There is a critical sequence from building first product (with the second intermediary) all the way to first intermediary of next loop arrives as there can't be too many molecules over the tribonder. That means loading from storage needs to be fast and delivery arm is too busy to help for that loading movement.

The last cycle save after reaching 185g stems from area save. I found that output glyph can be squeezed back and that gives arm 4 enough time to pivot the third intermediary.

(after all these, I'm not sure if the 6P reason - delaying the 7th product for 6th and indirectly - is that different.)