Cartrodge break-in and counterweight question?


Recently, I purchased a Denon DL-103R. I had read so many good things about this cartridge, I just had to try it!
This is a low output moving coil, so before I pass any judgement on it, how long should it take for this cartridge to break-in?
Also, when I mounted the cartridge in the tone arm, I had to position the counterweight nearly at the very back of the tonearm. Would it help sonically, if I ordered a heavier counterweight?
In advance, thanks for your input.
louisl
40 to 50 hours of break-in.

The counterweight should be as close to the pivot point of the tonearm as possible. So, yes you should get a different counterweight.
The tonearm is the stock tonearm that comes on a Music Hall MMF-7. Any suggestions as to a counterweight (what will fit, what would sonically be superior)?
Anyone know if the Expressimo Heavy Weight is still being manufactured, and if so, who sells it?