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Spyder Sonix vs Xtra
I've narrowed my new marker choices down to two. Both seem like cost efficient markers that will suit my needs very well. I'm slightly confused though. What is the difference between the Sonix and Xtra? It seems like the Xtra just gets a rubber grip on the LPC and a mini drop down. There's only a $10 difference between these two markers, so I suppose it doesn't matter a whole lot. Thanks!
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