@ tejon you saved my day and killed my no1 issues right away, good sir

ive seen elephants and silk in spades...i was quite overwhelmed with that pleasant surprise. i recommend downloading this file to everbody!!!
@zappara: i sure feel your pain making the tech tree, i feel everyone who watched the history channel once has an opinion on it. to clear my (very, very minor) issues with it is your incoherence regarding the development stage of each "device/idea".
For example: Photography was probably possible in the 18th century with all its theoretical knowledge and needed tools. the first "snapshot" was though taken in the 1830es if my memory serves me right, but that is all fine and dandy. You choose to implement the earliest possible mentioning of photography in the techtree. all fine with me.
with the steamenigine though, whose early models came to being in the early 18th century you chose to take the hundred years later model which finally propelled the first train and put that in the techtree.
Same with Nationalism. the general historical term describes political climate changes in the european theatre around 1850/60/70. there were certainly earlier mentions of the term in late 18th books, but the reference was somewhat different. here you chose the earliest inception again.
to me that is somewhat incoherent.
But remember this, you made the mod, the mod rules, and you are calling the shots. nothing supercrazy in here, so again, my complaints are very, very minor.
@zappara again: concerning my second issue with (too) little connections from the early/medieval cavalry tactics to any domestic use and prerequisites to other tech:
Instead of just whining and complaining here some argument for a change
Horse breeding as prerequisite for Siege weapons
Why: well the mighty catapults and triboks werent certainly carries by donkeys, bulls and manpower alone! more muscular horses were in demand for both warfare as well as field works which would also nicely flow in the following tech serving domestic need in building windmills or providing work power for the later three field crop rotation.
Chivalry as prerequisite for matchlock
why: sounds strange at first, eh? Heavy armoured horseman ruled the battlefields in late medieval warfare. arrows and most crossbows didnt have enough velocity to penetrate those defenses. my logic hereby would be: why pushing expensive, unreliable (rain and moist wrecked earlier gunpowder weapons) technology if here would be no need to do so? the dominace of knight demanded an answer to a problem that wouldnt have been there without them.
so so good, back to playing a bit,
have a good one