Welcome to the Wicked Edge Forum and Community, Ron. You should invest in the 12″ arms. Especially for sharpening wider blade style Kitchen Knives while employing the Low Angle Adapter, (LAA). You’ll need the longer rods to efficiently utilize the length of the stones up and across the knife’s edge. The longer rods can be a bit clunky to get use to. I find, even after years of experience using long rod arms I still knock the rod ends together from time to time. Especially when I get an alternating side rhythm going, (i.e., left-right-left-right), and don’t pay close enough attention to my rod motion.
You may also want to look into the Tormek Small Knife Adapter, too. It definitely is a worthwhile tool to have ready in your arsenal for sharpening smaller blade knives like paring knives.
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