Just make sure to switch back to 100pF once your ears and your brain are relaxed and refreshed and try again.
You can also try 320pF, of course.Just remember that neither Oftofon nor Pro-Ject can tell you exactly which value will sound best. And that's not because of the usual "everyone's hearing is different" talk but simply and technically because they don't know how much input capacitance your turntables cable will add.
As I said, 150-200pF of cable capacitance are typical values, but it could be noticeably less ... or more.
If the cable is detachable from that Technics I hope you kept I as short as possible! Too high capacitance values can lead to a massive peak somewhere in the treble region >= 5 kHz (which might sound like better detail at first), but followed by a steep and massive downwards slope right after the peak. You might loose all the really high treble.
Some pickups are more sensitive to capacitive loading than others. The internal inductance and interna resistance of your Oftofon are on the lowish side of normal, which is good. But still, usually lower input capacitance simply results in a more linear frequency response.
