This may have already been posted, but when I purchased my Smith machine there was an option for bushings on the vertical guideposts or linear bearings. I prefer the linear bearings, they provide a much smoother feel. Definitely opt for the safety bars as mentioned above. Then you have the option to lift free weights with the advantage of the safeties.
There are 3 loves in my life: my wife, my English mastiffs, and my weightlifting....Man, my wife gets really pissed when I get the 3 confused...
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