Does anyone know what reference the physics motors uses to place the fuel tank in game? Here is what I did to explain why I am confused: I place the fuel tank HDV location according to the commented HDV file: // location of tank relative to center of rear axle in reference plane. The location of the tank in susp.pm was at (0,0,0) I confirmed the position using SuspEdit2.exe, the tank was where is should be I ran and closed devmode, and opened the <vehiclename> (converted from pm).ini in pTool and found that the tank location was significantly forward of where it should be I relocated the tank in the HDV file, re-ran dev mode, and reopened the <vehiclename> (converted from pm).ini in pTool, the tank was still located forward of where it should be I relocated the tank in the susp.pm file, using the susp.pm origin as reference, re-ran dev mode, and reopened the <vehiclename> (converted from pm).ini in pTool, the tank was located where it should be. Should i trust the pTool visualizations and place the tank using the susp.pm file and its origin? Or should i trust the HDV file comments and the SuspEdit2.exe? My concern here is that this program was created using the HDV comments.