yes, i do have a genuine sanwa 491 by FH5, SSL, SUR moded PGS XRII in my Infinity IF18-2 and XR in my MRX6X, however, tried FH5, "SSL" SSR PGS HR didnt work, FH4T "SSL" SSR PGSHR didnt bind.
my self funded quality assurance for this "clone" in terms of Function Test , SIT and UAT are done which just ONLY works in FH5U, SXR PGS HR.
With that said, no real response test on the working mode for my existing HR servo can be made per my human perception.

above for reference and viewer discretion only.