I replaced my 3-step with a 4-step several years ago, and have had no problems with it.
We really enjoy the 4-step and would NEVER go back to a 3 step. I test it every day with my 250 lbs and it's lasted with us full timing. It does have a little give in it when I hit the bottom step, but it's not an issue.
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1999 International 4700LP With Stalick conversion
2005 Mobil Suite 33RS3,
Yamaha 500 Kodiak & 500 Wolverine
And our mini Greyhound, Shalamar
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