Tony - I have three words which don't extend, your two plus 20. The other ten can all pick up the remnants (and obey the no agent noun rule). I'm guessing that I must have it right, I just find the end result a little unappealing.
Cockie - it just refers to the actual clashes. 4 of them are used in the first scene (and believe me it will be obvious which ones to use once you suss the scene), you then put in the alternate 4 in the endgame phase. If you get the (main) right hand side of the object, it makes the left side easier. Even though there are 18 characters consider that they don't necessarily each have to contain 9 ....