FWIW, I have the 1 1/2 hp Ridgid TS2424 and I have a regular kerf WWII. I
havn't had any problems with it and I have used it to cut 8/4 hard maple.
Keep in mind that if you do go with the blade stiffener, you will not be
able to raise the blade to the same height as without it. Your maximum
depth of cut is lowered.
All of my tools are underpowered, and I find the thin kerf blades are
a godsend. As far as using stiffeners, you should try them both with
and without. One of my saws does great with a stiffener, but another
cuts better without them.
Sorry. There are actually two types that I have used. One consists of
a single disc, with a rubber-gasket type thingy, and the other is a
pair of thinner metal plates of larger diameter. I suppose I just
should have proposed that you not assume the saw will cut smoother
with stiffener(s), but experimenting will be worth your while.
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