Need some information about Mantinea 207 BCE

[Paullus Scipio]

Paul B. wrote:-

They are originally developed in Taras if I recall, where the science of mechanics- the applied version of the science of mathematics and considered of lower status- originates.

...really? I hadn't come across that before.In fact, Diodorus tells us categorically, that in 399B.C. when Dionysius I was Tyrant of Syracuse and preparing for war, manufacturing weapons of all sorts......
"In fact the catapult was invented at this time in Syracuse, since the ablest skilled workmen had been gathered from every where into one place....." Diodorus XIV.42 and ".....the Syracusans slew many of the enemy by using from the land the catapults which shot sharp-pointed missiles. Indeed this weapon caused great dismay, because it was a new invention at this time..." Diodorus XIV.50.4
No mention of Taras, and AFIK Diodorus is our only source for the invention of catapults......so I'm most interested if there is more on this subject....