Bonestructure, have you considered zipping it before sending it to the other person? I've found that .OBP files zip REAL well. Something to the point of a 250K file zipping to 22k. Not bad at all. That 1.5M file should end up being something in the neihbourhood of 200K, when it's all said and done. FYI, that was PKZip 2.50 for DOS using maximum compression. Also, did the model include a lot of booleans? I've noticed that tends to make the .obp real large real quick.