Its toward the end Philo criticizes the weapon for a fixed line of fire no matter its achievement in rate of fire and crew minimization. Old notes allow me to refine that to sections 73 -77 but I did not annotate my notes to passage level sorry to disappoint you (nor can I recall now if there was a supra 'book' level I left off). So thus my initial comment is post #2 was purely by memory. In this case It has been quite some time since I have had access to the Belopoeica of Philo Byzantium and one that had both the Greek and a translation - 20 years in fact ( the Greek would help me little now my koine is pretty rusty).
I was unaware of peer reviewed journal standards are now enforced at the VV - you will be uploading a CV to demonstrate you do have a PhD in a relative classical history related field so as to referee this new situation. saie a polybolos could not be rotated or pivoted? If you said it previously, then I apologize, but can you again tell me the ancient source that specifically. Again, what contemporary primary source, in their own words, said that a polyboloa couple not be turned or pivoted.