I run both the stock and Oade, line-in from DPA4060s> MMA6000. I have run them in situations similar enough (same venue same seat, same instruments) to try to compare them, but different enough (different violinists, different works played) to make me unsure I'm really hearing the difference I think I hear. I think the Oade mods are a modest improvement at a modest cost, definitely worth the money to me.
If someone can suggest a simple fast but more objective test, I'd be happy to try it. Should not involve laboratory equipment, six-figure audiophile equipment, or explosive devices.
Jeff