Congrats on the new release! Lots of good stuff in there, and I'm glad this must-have mod is still getting updates I just updated to 1.2.0.0 via CKAN, and got a weird bug when simulating. The "Simulation Length" field when setting up the simulation from the VAB had the unusual value "0.25" in it, and the simulation cost was about 1/10th of what I would have expected for a vehicle of that size. When the simulation started, just after I staged, I got the "simulation ended" message asking me if I want to extend the simulation. After extending it, I almost immediately (<1s) got the same message again. The cost was still about 1/10th of the expected simulation extension cost. When I went back to the VAB and erased the "0.25" value in the simulation length field, and clicked the Advanced Options checkbox, the length field got populated with the expected "00:00:00:15:00" value, the cost reset to a more reasonable value (about 10x the previous one) and the simulation worked as usual. Here is a folder with all the info I felt could be relevant (so far: modlist, KSP log): https://www.dropbox.com/sh/5e2474koekvnc04/AABGYOBdTvItj_t3bTp_yZNUa?dl=0 Let me know if you need any more info!