Soundsmith Zephyr MIMC with less than 6 hours of use

Essentially brand new, just received it from the dealer on 6/22/17, I demoed it in my system for maybe six hours maximum and compared it against a Dynavector that I also just bought intending to keep one as a spare. The Zephyr is an outstanding dynamically musical cartridge and revealed inner detail that I had not previously heard yet after my six hour test I've come to the conclusion that I prefer the "house sound" of the Dynavector so the Zephyr is now available. My tests were conducted on a VPI Prime/3D tonearm through a Soundsmith MCP2 phono preamp. CONUS ship only ($13.60 flat rate). Thanks.

Zephyr Technical specifications Stylus - Selected Contact Line low mass Nude Stylus Radius of curvature - 6 x 17 uM Cantilever - Boron Recommended Tracking force: 1.8 to 2.2 Grams Effective tip mass 0.32 mg Compliance 10µm/mN (low compliance) Frequency response 15-45,000 Hz ± 2.0 dB Channel Separation 1000 Hz >28 dB (stereo only) 50-15,000 >25 dB Channel difference <1.0 dB (Stereo)  <0.5 dB (Dual Mono operation- w/optimal VTF setting) Output 5 cm/sec. RMS 2.4mV RETIPPING COST $250 Cartridge weight 10.27 Grams Load: Greater than or equal to 47K ohm    

 
The “Zephyr MIMC” cartridge is designed and manufactured in the USA to extremely exacting standards. The unique design results in a "no-compromise" moving iron cartridge design providing the listener with unparalleled performance through employing a tiny, ultra-low mass high-purity moving iron element. The “Zephyr MIMC” cartridge differs primarily from other cartridges in that the total moving mass has been reduced to an astonishingly small level. A key optimizing element in The “Zephyr MIMC” cartridge is the use of a single-piece, ultra low-mass moving iron, stylus and cantilever assembly. If required, it can always be rebuilt to new condition by The Soundsmith. Its design insures optimal performance for many years to come. 
 
 The “Zephyr MIMC” cartridge is a low output “moving iron” design, and is compatible only with standard “moving COIL” phono inputs. The minimum load must be 470 Ohms, or greater for proper high frequency performance. 
 
 The “Zephyr MIMC” cartridge employs a unique energy dissipation design used in our top of the line SUSSURRO cartridge.