bahahahaha been there done that....try opening a file sent to you to map out...takes 3 - 5 hours to get the damn thing open and then realise that the fool (not me) saved a 12D file with 100 000 points!! when the job could easily have kept its integrity with 15 000 points LOL...I feel your pain..and I used 3 CAD programs to try and get the damn thing running.

cheers bullet