Mine was also near 16K on the APC 9x8, Powermaster-5%, OS-8 ... 70 deg. 1500 asl
Mine is almost brand new so not broken in yet-
I have it on a little engine stand on my dresser to look at-

Its' a sickness!
Consequently the OS-50SX is almost identical on the 9x8 butusing 15% in her- My Webra-50GT has a slight edge on the Rossi (still not broken in remember--) and I am gonna test my OS-50FSR Heli right now, with a strap on Bisson muffler---