Hi Pspa123,
If you’re in a higher BMI range, that makes sense to keep that firmer core in place.
If you purchased a component system from a trusted retailer, you may wish to contact them and seek their advice for your particular configuration.
If that isn’t the case, you may wish to reach out to the different vendors in the component post here about their topper offerings and seek their advice for your BMI and mattress configuration, and also at that time explore any potential return/exchange policies that they might have just in case your topper purchase doesn’t turn out as successfully as you might hope.
I’ll be interested to learn about your results.
Phoenix