Wow. Talk about over engineering your rockets man. I generally quad my engines rather then use the mainsail, and combine that with asparagus staging instead. Most rockets weigh in at the 150-180 ton range, are just about as efficient, and generally good enough for launching 40-60 ton payloads to the Mun. Lately however I've been focusing on smaller launch vehicles, and building a orbital industry of sorts that allows you to re-fuel a tug in a 80 km orbit at a space station, pick up cargo from the same orbit, and then deliver that cargo be it a lander, or components of a base to the Mun or elsewhere. While slightly more time consuming the amount of delta-v saved is actually quite impressive.