I wondered the same thing about our Montana HC which has the 4 pt. leveling system. I kept the Steadyfast system from our previous 5ver just in case, but have not felt the need to use it. It is much more stable without any other stabilizers than our Cougar was.
I'm guessing you will be pleasantly surprised!
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2016 305RL Montana High Country
2015 Silverado 2500HD 6.6 Duramax
Life's a Journey, Slow Down and Enjoy the Trip!