I agree with Dusty on the accuracy of the 510 and 520 system. I have one of each. The one thing I really like more about the 520 system is the knobs are easier for me to tighten and loosen than the rollers on the 510. I have to revamp my hook system for the 520 tables to store on my French cleat wall because they take up more room thickness wise because of the nobs on the bottom. After using both for some time I actually prefer the 520, don't know if I prefer it $500 plus more.
If you are going to upgrade, I suggest you schedule a Mike Yong or Doug Reid zoom presentation. You can get better discounts from Shopsmith through them.
510 to 520 upgrade?
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