Recently, I had a bag stolen, so it was a fluke that I got a lightweight VP (168 medium) from my friend's VBB player's pack, but I've used it all summer, and I am happy with it.
The VP has been my main putter for about two years or so. The 168 medium VP seems to be quite a bit straighter than heavier VPs, particularly at the end of its flight, so I find that it's very predictable.
My putting style is spin-putting 95% of the time. What I used to do with heavier VPs (mid-170s firms) was try to give it just enough power to make it to the basket, and then have it fade into chains. This worked incredibly well for a long-time, and it also helped improve my approaches, because if I missed running the basket, then the VP wouldn't be too far from the basket.
Wondering if anyone has tried lighter weights in their putters of choice? Presumably the more stable putters, e.g. Ridge and VP respectively, would have straighter flight characteristics/more glide in lighter weights, but I was just wondering if anyone else has experienced this. Also, I think Vibram in general gives different flight characteristics in different weights, but I don't know if science can validate that observation.