https://www.dropbox.com/s/5szl6zao1a5j2h2/Problem.png?dl=0 theres a screenshot for the duna issue, it does in fact look like somethings put Duna in the wrong starting position. Its not kopernicus, as ive removed that (actually just kopernicus tech, required for kerbol plus mod) so ill look for the cause elsewhere. perhaps theres a way to query the game file for this info on sfs load, and cut universal time out of the computation?. also i can see why youre getting the jool question alot, having fiddled with it it seems that "earliest departure" and "earliest arrival" simply declare the plot area that the algorithim searches for a min dv within, rather than (as the uninformed user such as myself would assume) simply the earliest dates youre happy to work with. Maybe theres a simple way to make this clearer. thanks for the reply!