It's not tough to do Nancy, as the carpeting and bubblewrap insulation both compress easily. And Yes, it's a tight fit which is good. The linoleum is quite thick and it was a little tough pushing it behind the upper cabinet while at the same time over the window....while pushing behind the lower cabinet. I just took slow and easy.
One thing I didn't mention is that when I was plotting this mod I thought I wanted something clear to put up so I purchase several different products such as: plastic covers for florescent light
and I don't what else. But they were too brittle. I managed to cut the window hole but they broke when I tried to put them over the window and behind the cabinets. I didn't want anything metal or industrial looking.
I've had my back splash up for I'm guessing 10 years or so. I've thought in recent times about changing it out and putting up something a little lighter in color. So that's on my list of potential projects.