Fixed attach node sizes and positions for the H.E.A.T and MSV series parts.

All of these parts had no attach node size set, causing the game to assume they were size 1 (1.25m diameter).
I also noticed that most node positions were off by a few centimeters (or, in case of the H.E.A.T's radial attach node, FOUR meters!) and corrected them, except for the radial attach nodes of the 1.25m and 0.625m parts.