Jeff, trimming the forward edge of the door will simply mean the edge moves in a more forward arc during opening. If the forward edge is extended, rather than cut, it will tend to rotate inward rather than forward. The edge should be forward of the axis of the hinge pin.
Here is another rather straightforward mod you may want to consider.If you are trying to create the appearance of a longer front guard (wing, fender) try repositioning narrower vent slots rear-ward. I think it worked somewhat on mine.
My doors were a major undertaking but as prototypes I expected that. It you want information on how I would go about it again let me know. Basically I purchased fibreglass doors and chopped 50mm off the top and 50mm above the crease in the panel, that was between the lower hinge mount position and the bottom edge of the door structure. I left them original at the 'A' pillar and kind of hide the change of height with the rearview mirror.
I also made the outer skin removable (like newer VWs) so I can adjust it to match the front guard (wing, fender) and the rear panel.
Sorry for the rant.