I made this light science/crew transport SSTO plane, Supafly-1. It weights littlebit over 7.5t with fuel and 4.53t empty. After months test flights, first mission with Supafly-1 is to get orbit and rendezvous with Kerbal-Station 1 at 215km orbit. Second part is to change Kerbals between Kerbal-Station 1 and Supafly-1. Third part is to land KSP Space Center. Bonus mission is to run science tests. Result: Supafly-1 made to 80km orbit with plenty of fuel left. rendezvous with Kerbal-Station 1 was success. Donlie Kerman took the place of with Bob Kerman. Deorbiting and landing to KSP space center. Success! Science test results: Failed, Bob Kerman went to cafeteria and science samples where stolen.