That is what experienced players does to put big payloads on orbit.... - they use practices of designs (popular or self invented) - they invent tactics of staging, docking and for other things In this game everybody can use the same (stock) parts to achieve different goals, but this game is interesting because you can create a space station or landing ships not because you have better technologies but you have the experience of designing better stuff, make more effective docking and other manouvers... With the new engines you don't have to learn about physics, you don't have to invent your tricks and try it over and over again to achieve your goals... you just put that huge rocket under any payload and the problem is solved(you will have enough thrust to put it in orbit and you will have enough fuel for the mission).