SME V and cartridge spacer

Ok, actually did find the Purple Heart specs on line:
Weight: 7 g (jolly light for its size methinks) 
Compliance : 16cu 
Arm mass used: 10.5 g
Therefore resonance frequency: 8,7793 Hz
This being well within 7 - 12 Hz range. 

As for the damping, I'd suggest pretty much in the middle between the two ring markings and more towards the bottom ring mark (lighter damping).
This when I compare it to my Ortofon Quintet Black, with Shibata stylus, 10.8 g mass incl. cart leads, brass mounting screws, and cu 15. Resulting in rf of 8.9 Hz. 
Michélle 

So, justmetoo, by your calculations what would adding the 3 additional grams for the spacer do to the resonance frequency, everything else being the same?

Also, could someone explain what one might hear in ones system, all else being the same, with the cartridge/arm resonance frequency at either ends of the acceptable range, say 7-8 and 11-12Hz?

The rf without the spacer by using the 7 gram cart mass only, is showing up as 9.5 Hz.
Still well within the accepted range of 7-12 Hz. 
Though in this case I'm not quite sure about the best damping setting with the SME V arm. 

My intuition tells me the set-up with the spacer, considering the cu of 16, will be more favourable.
If the cu was more toward 18-20 then I'd opt for the setting without spacer, but not with the SME V arm, due to the issues mentioned. 
So all this looks IMO (and YMMV), just fine  using the spacer with this cartridge, on the SME V arm.
Finally, DO NOT underestimate the finer differences in SQ that small changes in damping settings will do. 
Michélle