I ran into a recent snag trying to mix it up in a diety game. I was well ahead of the Lib curve (had education when nobody had paper yet). My goal was to take Steel as my free tech and obliterate the continent with cannons. The problem: Cyrus caught up about 3 turns too early and snagged it, 640 AD. In retrospect, I screwed up the bulbing. I was at 100% research for at least 40 turns, I even threw Cyrus as many anarchy turns as possible. My last bulb was supposed to finish off Lib and seal the deal, but I realize now that in taking machinery (which is EARLY in the line through Steel), Printing Press takes bulb priority for scientists. I.e. you have to do ALL of your bulbing before grabbing machinery. The real issue trying to get Steel from Lib is that you're most likely on your own for getting Gunpowder and Chemistry (and remember, you can't even get close to either until you are completely done bulbing the liberalism line). So there are two ways around this: 1 - You can throw a bulb from a GE into machinery or engineering. Gunpowder and Chemistry won't be possible to bulb unless you can avoid Guilds -- one of the harder techs to trade for pre-Lib. 2 - You can GS bulb through Printing Press. It will only take one bulb and a couple turns, and if you're CE it will probably help you if you do it early enough. *BUT* if you do go this route, your Lib bulb HAS to be pre-chemistry, or else your bulb becomes Replaceable Parts. Also make sure you don't get Compass or you're stuck bulbing through astronomy! So your tech path looks something like this: Paper->(bulb)education->(trade for machinery)->(bulb)Printing Press->(trade for Eng)->Gunpowder>(bulb)Liberalism to 1 turn > Chemistry > Finish Lib > Free Cannons! Granted, it will probably take a few turns into machinery/eng to procure a trade, but this isn't bad way to go about it. I think I'm going to reload and see how it works. If anybody else knows of an easier route to Lib-> Steel let me know.