Hi smmimp14,
If you mean post #5 in the topic then yes I saw it and replied to it (also last night).
A link to the better online sources for toppers I’m aware of were included in two of my previous replies but to save you looking back they are in post #4 here. Each of them will be your best source of guidance about the properties and firmness of the specific toppers they sell.
If your pain or stiffness goes away after stretching then it’s normally an indication of an alignment issue.
Phoenix