<< as for the power in the 5-6K range due to the lack of resonator, i seem to notice a slight loss, but really haven't been able to take it full board on the highway yet. >>

there might be a loss, or it could be that since the sound of it rattling is absent, it seems like it's slower.
so what i'm saying is, i can't confirm whether it had any effect on the power.
btw,,,,the longer i waited to get the rattle taken care of, the larger rpm range it affected--until it was occurring basically every time i accelerated.
toby