Here's my entry, which I literally just submitted to the K-Prize thread. Cargo-Variant of the Starstreaker SSTM spaceplane. It delivered a small probe lander capable of science transmission. Cost: 79,664 Kerbucks Tonnage: Dunno, gotta check. Mission Time: 17 Days 2 Hours 9 Minutes 38 Seconds EDIT: And for the poll, there should be a "Does not drop any parts" option, that is what defines an SST(insert character(s) here)