Just a fair warning. Please don't invest too many skill points in any Engineering BOs that have the Aceton I or Aceton II skills in there skill list. The skill can't be used and cannot be replaced with different training.
As it stands now, both of my Engineer BOs with maxed out ground and space skills through LT are going to have to be replaced with brand new BOs that don't have that skill as a default. That means a ton of wasted points (not that it is very difficult to get the points, just a shame to waste that many).