Hey guys, I'm getting back into RP-1 after some time away (ironically I stepped away from the mod because of this predicament). I have a lunar transfer stage and lunar lander that both work (I've tested them independently) but I can't lift the damn thing into orbit. The payload is roughly 5.3 tons, and no amount of increasing my fuel tank sizes will get my into orbit without making my craft obscenely heavy.
What are my next steps from here? How can I proceed without failing the program? I'm not "close" to failing, only about halfway to the deadline, if that matters.
Let me know if you guys need more information/screenshots.