Started to cut the first window for the left front side door. I am using a dremel with cutoff wheel made for plastic materials. The cutting process creates an amazing amount of dust so there are several stops to clear some of the material from the dremel, etc. Taped the uncut window over the door opening and used a sharpie to mark a line that left plenty of margin on each side for the first cut. While cutting I used some large clamps to hold the window to limit the vibration when cutting. After the first big cut, made a few smaller cuts to sneak up on it so I don't accidentally overcut any side. The next few cuts will get the window down inside the door frame. Future cuts should go faster now that am getting used to working with the window material.