These 25 turns took a long time to play, but thanks to early growth and excellent trade opportunities the result is better than expected. After corporation I could hold 2 techs a turn.
AD
20 Economics, SSC Sewer System
40 gold to Cardiff 480g
60 Chemistry, SSC University, beads Isthmus SSC 182g, hides to Cardiff 368g, Indians: trade for Warrior Code
80 Copernicus, Iron Working, gold to Cardiff 528g
100 Bridge Building, silk to Delhi 92g, hides to Cardiff 188g, copper to Cardiff 160g, Indians: gift all techs
120 Navigation, Celts develop Chivalry, finally I can skip two techs, hides to Cardiff 80g
140 Physics, beads to Cardiff 172g, hides 220g
160 INC, Invention, SSC size 20, science needed 851, produced 574 at 70%, 4 more scientists can be added to the SSC, Democracy is planned for 220 (oedo rev.) and should allow 1 tech/turn in 240, the alternative: Democracy in 300AD, keeping the ship chain and using the hides repeater in the SSC until Leonardos is built, I think I will try the alternative
180 beads to Cardiff 208g
200 Magnetism, beads to Cardiff 192g
220 Steam Engine, wine to Cardiff 585g, one more turn now at 40 lux
240 SSC size 24, size 25 would have been possible, but with the early growth the jungle tile is still a wildlife reserve, Isthmus size 10, celebration ends, Gun Powder, Zohak (17th), a colony, science SSC 564, total 760 at 80%, hides SSC Isthmus 276g
260 Leonardos, Metallurgy, Celts: trade for Chivalry, hides to Cardiff 240g
280 Explosives,
300 Democracy (oedo rev.), science prod. 1034 at 100%, needed 1056, Indian warrior bribed near Tarsus 35g, beads to Cardiff 204g
320 Railroad
340 Darwins, Industrialization, Electricity, Istakhr (18th), a colony on continent 14, road Isthmus to Cardiff finished, Cardiff needs more roads! Science 1059, needed 1081
360 Corporation, Sidon library, Sidon gold to Cardiff 378g, beads to Tenochtitlan 672g, a nice +12 trade route replaces Isthmus at the SSC, Aztech Harbour (19th) founded, my new tradegate to Tenochtitlan at 73,57, 7 Freights invade Aztech lands, dye to Teotihuacan 264g, science 1153, needed 1104
380 Steel, Refining, more libraries built, Zohak captured by Barbarians

, wine to Cardiff 350g, hides to Tenochtitlan 672g, seems to be a hides demander

, little Cardiff founded (19th again), copper to Tenochtitlan 300g, science 1207, needed 1150
400 Leadership, Combustion, dye to Tlatelolco 204g, wine to Cardiff 265g, hides Arbela to Tenochtitlan 292g, hides SSC Tenochtitlan 672g
420 Automobile, SSC superhighways, more libraries, Electronics, 2 hides to Tenochtitlan 2x864g, science 1621
440 Conscription, Tactics, Susa, Isthmus, Dariush Kabir superhighways, hides production in the SSC has ended, but there are still 3 hides freights left, wine SSC to Cardiff 970g, wine Dariush to Cardiff 517g
460 Nuclear Theory, Machine Tools, Sardis, Samaria, Hamadan superhighways, Herat (20th), salt to Tlatelolco 342g, hides to Tenochtitlan 1044g, cloth to Tenochtitlan 198g, science 1738, needed 1566
480 Mass Production, Miniaturization, Bactra, Sidon superhighways, 3 hides to Teotihuacan 1080g, 444g, 504g, science 1771, Indians: gift techs, needed 1440
500 Nuclear Fission, Nuclear Power, -> Computers is next, Arbela, Tyre superhighways, 2 hides to Teotihuacan 348g, 1074g, beads to Cardiff 462g, science 1818 (SSC 1098)
stats:
Democracy
20 cities, 61 techs
units: 6 Engineers, 4 Musketmen, 1 Dragoon, 2 Dips, 40 Freights, 8 Transports
wonders: MPE, HG, Michelangelos, Colossus, Shakespeares, Copernicus, INC, Leonardos, Darwins