I second Gap arborist for the knives. They carry quality knives not the cheap variable crap some of these other guys have.
DW tracks - what model? What ever you do insist on standard OEM tracks, aftermarket tracks are lacking significantly. Summit supply out of NJ has given us the best price on the OEM Hiqual track on my sk1050. If you need their part number for that 9” track let me know I think I have a recent quote from them.
DO NOT ACCEPT AFTERMARKET
260 hrs vs 1400 hrs