The Xtreme and Henning guiderods are ipsc legal for sure.
Even for 9, the guiderod replacement is recommended. IIRC, Henning did the original development on an improved guiderod, the Xtreme more or less copies his design, and the PD is a relatively recent entry.
Of the 7-8 small frame tanfos I've run over the years, I replaced all the stock guide rods with the hennings.