Shawn did you try your blade on your brothers hand auger? Might be your brother will like your blade better then his.
I don't know how many tanks you've run through your Nils but after brake in you'll notice and improvement.
Is it possible you got a blade that is too aggressive, yes but I haven't
After my brake in I wasn't happy with the power so I went a head and inspected and cleaned the carb.
Main Jet is a 38. The part number(main jet (38) I posted earlier in this thread is for the older Nils without the brake which comes with a 37 main jet and will not work in the newer Nils with a brake.
I had a little bit of white residue and after the cleaning the carb and main jet, length of warm up required before the auger would cut was reduced and I had better power with no bog using the same blade before the cleaning.