https://21stcenturyequipment.com/blog/john-deere-precision-upgrade-kits-puk-guide
Breathing New Life into Your Fleet: Precision Upgrade Kits (PUKs) | 21st Century Equipment
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https://landmarkimp.com/news/john-deere-precision-upgrade-kits-from-landmark/
John Deere Precision Upgrade Kits from LandMark | LandMark Implement
Sep 25, 2025 - Unlock the full potential of your existing equipment with a Precision Upgrade Kit. Contact your local LandMark about John Deere Planter, Seeding, Tillage
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