I realized this after what happened tonight. I built a 450 tonne/250,000 credit monster rocket to deliver 6 geo sync comm sats (using RemoteTech mod to force me into a step by step moon program) in one launch equally spaced at geosync altitude. I learnt how to drop orbit to 5 hours for one orbit, then bring orbit back up to 6 hours each orbit and drop a sat each time......very neat trick. I then realized I had extreme amounts of left over fuel at most of my stages including the final. So began 3 more iterations of said rocket. Now it's about 110 tonnes and costs just under 100,000. So 25% of the original launch weight and 40% of the cost. it's orbiting at geosync right now with 1160 m/s of deltaV left which should be just enough to do 5 cycles of sat drops .... About 120deltaV per sat and 450 deltaV to get back to Kerbin. Heck it's so cool modeling orbits that I could burn less deltaV to a 5.5 hour orbit....do 2 orbits per sat drop. damn I love this game. Here's the before/after snapshots. Kelvin Geostationary Tug Mk 1 Kelvin Geostationary Tug Mk 4 CmdrRimmer