Hey,
This is probably a really stupid noob question, but I'm stuck in the advanced construction tutorial whilst placing the RCS thrusters!! I've followed the steps - added 4 symmetrical thrusters on the FL-T100 tank, moved them with the offset tool, reset them using space, and then turned off the COM indicator but it won;t let me click "Next". Not sure what I'm doing wrong! I'll try and insert a picture below:
2016-07-31 by Anthony Cocks, on Flickr