I just did this test last summer on the last few rides of the year, stuffed and unstuffed pump lol. I did notice the stuffer hurt the bottom end. It may be because I was running the R&D version which only has a few shims for the cone, so your cone is pretty much a constant stuffer in the reduction nozzle too. The TBM stuffer has a few different length cones, they might be a better option if you're thinking about immediate punch. The R&D seemed to do alright top end though.