My Freud panel cutter bit is becoming dull. The 3hp router is bogging down and I'm up to about 6 passes vs 3. I did some research on a replacement and my exact bit with a back cutter is no longer available. Whiteside came up as a quality brand among others. This review information was sourced 10 years ago and I know how brands can decide to start making crap with no notice. Who is generally considered the top of the line bit manufacturers these days? Does anyone have any experience getting Frued bits sharpened? Is it worth it?