You may have caught these already, but I posted some Karswell scans as cbrs recently, with his permission of course.
Chamber of Chills 008 with three stories and Chamber of Chill 023 with 4 stories.
I really like the way he brightens the page, brings up the white and deepens the colors. Ha, I just realized how incongruous that sounds. He brightens the page when he brings us tales of death and mayhem.