HF Dado Blades

[xli1]

I bought a set of HF Dado blades (40745-4VGA). The figure show it is rated for 7000 RPM, but the description says 4500 RPM. I thought it is a typo on the website. But when it arrived, it is rated for only 4500RPM. You know, BT3100 rotate at 4800RPM, so I am stucked here. The blades looks OK. Anybody out there ever tried this set before? Is it safe to use it on BTs? I just don't want to pay shipping to send it back. I guess I may have to put it on craigslist.

[LCHIEN]

There's also some problems associated with it being 8"
as well as the speed problems.
All discussed in the BT3 FAQ under dado blades.
All in all I think the best dado for the BT3 is the Freud SD206 but it costs like $60-75 depending on what sale you catch.