Metallic sectional ladders with Xtenda leg levelers on STAIRS

So I understand the standard tread-width of a stair had to be 9", with a 8" riser prior to 2012. I love my 3 section 24' Werner compact extension ladder, but with the extra width required to handle an extra fly, I can't use it on older staircases when I need to clean an upper window mid-case using Xtenda leg levelers.



Does anyone have experience using Xtenda leg levelers on Metallic brand sectional ladders on stairs? Are the base sections narrow enough to allow the feet to sit on the stairs properly without the weight bearing section of the rubber foot overhanging unsafely?



Thanks in advance.

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