Professional products balancer: which weight for magnum

A note for anyone planning on using this balancer:

I've been speaking with Jim at Performance Products over the past couple of days, and this issue was brought up by him. He incidentally is the guy that developed this product. I was contacting him about my fitment situation, and shortly after I got the balancer installed onto the crank, he sent me a message saying something to the effect of:

This product was never intended to be used with 5.9 magnum engines. It was developed before the magnum engine came out, and does not take into account the lighter weight of the magnum pistons. Therefore there is not a counterweight for the 5.9 magnum.

Now that's not to say that the counterweight we've all been using wouldn't work fine, but this is pretty concerning. I'm talking with him about where do we go from here, and he has mentioned developing the right counterweight, but said it will take some time.

I referred him to this thread and pointed out the fallacy in the instructions that say "for use on 93-97 360s, but not 360 magnums". He reiterated that the magnum was not around when the 80012 was developed. Caveat Emptor I suppose. I'm at a loss as to just running it as is, or switching to a much more expensive one, having wasted time and money on this one already.