the nacelles in those manuals back in the '80's were LF-XX for TNG, LN-XX for TMP and I think PB-XX for TOS with XX being numbers e.g. LN-64 for the TMP Enterprise nacelles, something to do with the warp coil arrangement just incase you're interested. Finally got the ship and it looks very nice, Definetly have to rip off the front shuttlebay for my Shangri-La.