I noticed in a lot of my HVs I tend to hide side thrusters and forward thrust..just because of looks. almost like I "pretend" the HV engines are able to swivel on all axis but if I would be able to carry some more weight on the green hover engines at the cost of (a lot) more CPU eg.. than I got best of both worlds! they act like the HV engines I want to use.. maybe make them a bit less efficient than a blue HV engine with according thrust?