Ferrator

I will try that. In the third tutorial I can't seem to figure out how to move past putting on the 2 goo containers. I have the symetry controls figured out but they just never seem to get placed right or something and "Next" never highlights for that task. I can't help but think I am missing something really basic here.

I am having a problem with advancing in the tutorial. In the first one when asked to delete the large motor I can't get that to work. In the third one even though iput the 5 fuel tanks on the capsule, the "Next" does not high light. Is there something really basic I am missing?