Here's a stupid question, but I can't seem to find the answer online or in the wiki. When do I need the actual MechJeb parts/attachments? As I progress through career mode, I've unlocked various Mechjeb abilities up to ascent guidance (haven't quite got to rendezvous/docking yet) and those options become available to me in the Mechjeb menu even without a Mechjeb part on whatever I'm flying. Piloted or probe-core, it doesn't matter. I've got no Mechjeb part on it, but I can still use Mechjeb to do actions... so what does the part/controller do exactly? Will they let me fly something without either a probe core or a command module?
