Finished a science harvest run at Minmus. Brought back the lander+lab/nukeengine-unit to Kerbin and sent Jeb to the surface with all the science. Modified the lander and added two tiny RC-rovers. Sent the lander + refuel up to the lab and did a successful docking. Decoupled the tank and crashed it on Kerbin. Transferred to Duna and did a beautiful aerobrake. Triple checked fuel levels on the lander, parachute timings etc. and undocked. Maneuvered away from the lab using RCS and activated main engine to begin the descent. But wait? Somehow, while trying to fit the rovers, I managed to remove the engine from the lander! Decided to brake with RCS and at least learn something about how the parachutes works on Duna and maybe even decouple the rovers before crashing on Duna surface. Managed to bring down the speed and entered Duna atmosphere. Didn't look good as it seemed like I was going to (crash) land at high ground but deployed the parachutes anyway. Also dropped the rovers that both got stuck under the landing gears but managed to wiggle the lander so the rovers could separate. The descent speed didn't look that bad, around 10m/s, so with full RCS-burn I actually managed to get the lander to the surface and flipped over it was still in one piece with the door facing upwards. The rovers also fell down in good shape, just one broken wheel each which became Jebs first assignment to fix. Science gathered, rovers tested and crashed. Jeb is now waiting for yet another rescue mission. This will be a challenge as I must bring the rescue lander within walking distance of Jeb, and will probably have to try different approaches before successful. Unfortunately for Jeb Star Citizen - Arena Commander just got released - so I guess he will have to wait for a couple of days...