I think it increased the bass a fair amount but it’s hard to know for certain without a stock set to ab. The mod for mine was very simple. I simply elongated the yoke holes vertically using a dremel and small stone. After that I was able to re use the stock pivot pins off the stock yokes. Very simple mod and allows the factory stops using the pin with dowel. I really wish I took post dremel photos but I kinda just did them one at a time and worked at them till the pins were a snug fit. Overall mod took about 45 minutes to complete.
The overall fit is much nicer for me. The contact patch is the whole leather strap essentially. The clamp force is actually a little stronger then I would like but it’s not uncomfortable.

