Igus slewing bearing for robotic arm

Im looking for a slewing bearing to act as a shoulder for a 20-30 lb robotic arm that needs to be precise enough to type on a standard qwerty keyboard. Does anybody have experiance with the igus PRT 01 slewing bearing? Suggestions of other slewing bearings for around 200 USD are also very much welcomed.

submitted by /u/confusedwhiteman
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