Best grout removal blade(s) for Vecturo OS 400?

[Stan Tillinghast]

I have a Vecturo OS 400 (actually have 2, bought a second from festool.recon.com), and need to do grout removal.
Since this is not a Starlock blade mechanism, I presume I am looking for one or several Fein blades for grout removal. Can anyone please confirm what specific blades I need for this?
Thanks
Stan

 

[guybo]

Hi, lots of stuff here. guy[attachimg=1]

 

[Sparktrician]

I've used the Imperial Blades 730 to remove grout.  It is a diamond blade and quite abrasive, so be careful to set it gently into the existing grout so that it doesn't scratch the tiles.