Hi, I suggested this on tfw2005 too, can I suggest it over here too?
1) Extending the piece (red part) in order to "hug" the female ports on the chest-wings (you know, the ones that peg onto those tabs behind Hot Spot' shoulders);
2) Adding and replacing the nozzle from his original position (blue cross) to the new one (green part), also to make them already pointing forward in vehicle mode;
3) Adding some grooves that will attach to the bumper (black dots. The bottom one should be longer because the space is deeper), in order to give the pieces addictional mounting points;