Parameterized Coverage...HOW?

Say I have a data bus of width 8, this is how my coverage looks like. So far so good. However, I would like to reuse this coverage for another testbench that has a different sized data bus. How would I go about parameterizing it? I have tried so many methods, including >> covergroup cg_data with function sample (int bit_index); >> coverpoint data[bit_index]; >> endgroup: cg_data But the coverage report only displays one common coverpoint called " data[bit_index] " instead of "data[0],data[1],data[2]..." Is there an option for it I am not aware of? Also tried using macros, wrapping covergroup inside another class... I feel like I am just hitting the walls every time I try something