I have the 4212 with Gen 3, and though we've only used it several times, (leveling), it did a perfect job.
Jim
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Jim & Kathy
2016 Ram 3500 DRW/crew cab/long bed/4X4/Cummins/Aisin/4.10/rear air assist. Pearl White
2016 Jayco Seismic 4112, WD/Trav'ler Direct tv SWM satellite, slide covers
B&W RVK 3600 hitch
USAF Viet Nam Vet
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