First post and already a problem
Also, sorry for my bad english, not my native tongue.
Ok, I downloaded the very latest MechJeb from here:
Extracted the files to my GameData folder so the Directory Structure in GameData looks like this:
Changed the part.cfg to this:
TechRequired = start
entryCost = 0
(I also tried it with TechRequired = basicRocketry, but same effect ->)
Now when I start KSP, goto RND, I can then research the MechJeb AR202 in the start node.
If I go and build a rocket then it tells me below the AR202: "part model requires an entry purchase". I can't click / place the damn thing . I don't get it.
When I go back to RND then (after I was in the rocket building screen) I can research the AR202 again, but nothing ever changes.