Has anyone figure out the new Lab level requirements to achieve Coupling for each era with and without a Plus account (given the new extra trains required)?
Not literal Like you ask but have a look at my topic about which RP routes cost how much RP and today I posted a Lab table on how much RP are generated in one era..
Only until Era 4 (my server is in the middle of Era 4). Including the complete research of one engine (Lynx, Morpheus, Thor or Poseidon):
Era 2: 12 /15 (with/without lab) (old researchtree 11/14)
Era 3: 14/18 (old: 15/19)
Era 4: 17/19 (old: 18/20)