I think your confusing the Lisle 15000 in question to the 3 prong spring loaded type they also make.
The 15000 is, as others have stated a rigid stone hone with micro adjustment and felt scraper guides. It's mode of operation is like the Sunnen and indeed resembles it.
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The other hone works but to fix issues you have been posting about the AN style has the best selection of
stones either silicon carbide or aluminum oxide to cover any ring job you have had issues with.
While it works for some that believe the AN hone is a big ticket tool the 1st time you try to get away with using the wrong stone thats close and you need to tear down again that AN hone will look real good
The older hone has had its place and todays rings are not what it was made for. Limited stone selection at best when
compared to the AN style.
I get the use what ya got deal but it don't seem like you are given up this trade any time soon. This is just another
example of needing more tools for the trade.