Thanks people. The clipping is behind the docking ports on the 5 way docking bit, a few batteries and rcs tank. The struts on the orange tank were a mistake, tried launching 3 tanks at once and failed (epic) so switched to launching 1, didn't notice them until most of the way to orbit. And yes, my docking skills are not great, there may have been a few "love taps". Anyway back to the drawing board.