So this is probably just small potatoes, and really just a nag. I use the Blender-collada-PCS203 route, and everytime I get into PCS the thrusters are always way off. Usually way low and too far forward from their original place. All other points (subs, gunpoints) are in place perfectly. It's not a huge deal to move them in PCS, but it would save some time.
If the thrusters are attached to a subsystem, then the
helper and
thrusters must be located at the subsystem's (0,0,0). If there is no subsystem then they must be centered on the hull (detail0)'s (0,0,0).