Clay, I have a question that you might be able to answer. While I was visiting with Burkholder I saw that he actually teaches to lay the platinum solution over the color pigment from the printer. Could it be possible to do this with gum? instead of doing the pt/pd first, develop etc, etc. Can you do the gum first, expose, put the pt/pd over the gum, expose and then develop and wash all together? This might help prevent the shrinking with the paper. Which to tell you the truth is the reason I have not tried gum overs yet.