I'll see what I can do with this one. I have an idea to make it their 2nd champion by utilizing the horse prop point use for cavalry gathering.    This is a good idea for a special building (vanilla) and their cult statue (DE). Any idea of the original look? Is there an illustration anywhere?

Besides the obvious Epaminondas and Sacred Band, I’m happy you have included their “fire-throwing engine”. From the top of my mind, I can suggest the Hamippoi ("those running with horses"), highly mobile light infantry (possibly javelinmen) that ran alongside cavalry and countered enemy cavalry (maybe could have mutual bonus). Xenophon says “Epaminondas on the other hand had made a strong column of his cavalry, also, and had mingled foot soldiers among them”, and says that “Another duty of a cavalry commander is to demonstrate to the city the weakness of cavalry destitute of infantry as compared with cavalry that has infantry attached to it. Further, having got his infantry, a cavalry commander should make use of it. A mounted man being much higher than a man on foot, infantry may be hidden away not only among the cavalry but in the rear as well“. Found this video about them (where at the end he mentions the Macedonians also using them), and since they are more a role for the fit and not a completely different unit, maybe it could relate to unit upgrade with experience:   Regarding special structures, the Tropaion of Leuctra (trophy monument for their victory against the Spartans) still stands today a few km away from Thebes (where there's not a lot still standing), although only the top stone shields are original. Here the photo I took of it:

So, I've uploaded release 28 to mod.io: https://mod.io/g/0ad/m/theban-greeks#discussion Just waiting for approval! Luckily it's a very small mod (under 2mb). Here's the pyromod if you'd like to test it before it goes live on mod.io   theban-greeks.pyromod     Any suggestions on how to improve the mod? Keep in mind, it's a simple civ mod which adds to the base game and isn't intended to change the gameplay of the rest of the civs or change the meta (such as in Delenda Est). 

https://gitea.wildfiregames.com/0ad/0ad/pulls/8323

Speaking about asking R28 questions… what happened with the Ship Cladding tech? I can’t find it anymore, nor any discussion on its removal.