Hi rkate,
I’m not at all surprised that the Pamper is too firm because it’s the firmest of the lineup and there is only 2" of latex in between you and the 40 ILD support core.
Post #8 here and the posts it links to has some guidelines for choosing a topper depending on whether you are looking for “a touch to a little” or “a little to a fair bit” or “a fair bit or a lot” more softness in your mattress based on your experience on your mattress…
A good “average” choice for a latex topper would be in the range of 2" and for most people … 19 - 24 ILD would be in the “soft” range. Very light body types may prefer 14 ILD which is “ultra soft” while heavier body types may prefer 28 ILD and higher but the “feeling” of softness varies by body type, sleeping position and individual perception along with the thickness and ILD of the topper.
“Just enough” in terms of softness and thickness is usually better than too much of either because a little firmer or a little thinner will generally be less risky for spinal alignment.
Phoenix