The wax and pva release film did a great job. The skirt popped off without too many issues. Had to convince it in a couple of places with some plastic lifters but overall it came off real easily.

As you can see in the image, I have drawn some vertical reference lines over the skirt and onto the fuselage to find back the exact same position and alignment after cutting.

The inside looks very smooth. I don't see the need to do additional filling with micro here. It will hardly be visible in the cockpit anyway.

I used a dremel cutting tool to make a rough cut passed the line and will be sanding and filing it down to final shape but couldn't resist put it back in place to see how it looks.

Next picture is after rough trimming on all sides. It's starting to look like a factory made rear skirt.

View from the top.

Then started to use the vixen file to further fine tune the cut to the cut line. It's a tedious job which requires patience and a good dust mask. As you can see on the sawhorses and the floor, a lot of epoxy dust becomes airborne and this stuff is not good for your lungs.