I was using a single gn drive (the one with the greenishblue particles) and that was it. Just testing it out to see if I could get it to work. I'm also using the v4.3 file and 1.1.2 ksp. I've tried making a spaceplane and a simple rocket neither seems to activate. Antigrav and hover didn't seem to make any difference as well. Gonna do a fresh install later see if I have conflicting mods or something. I'm currently using nearfuture solar/electrical/propulsion and the heavy lifting pack