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[solved] Shower cartridge should just pull straight out?
Typical lurker here, looks like this guy has the exact model and he attaches the handle and gently prys on tabs on the top and bottom with a screw driver (you might need a pick to really get it in there) to wiggle it out. https://youtu.be/JDPIXUwR8WA?si=OmDHhtSx0k6CwnCb