said by Nailgunner:
To each his own...but...
Even though I have been using the GVJack App for the last few months, I used the MJ with the 100k ohm solution to fix my caller ID issue almost 3 years ago, and have had 2-3 phones hooked into the system the whole time with no ill effects.
I'm going to Radio Shack tomorrow and pick up the resistor. Even if it doesn't work, it won't be that expensive to try. I figure I have a total of 2.4 REN at the moment. All the lines ring and seem to handle calls OK.
Thanks for the advice.