Before you cut a slot, try playing with positioning the saddle. I would try angling the nose down a little bit, while at-the-same-time dropping the height of the seat post. I know from reading your previous posts, that the saddle height is good for you, so you want to measure and/or come as close as you can to keeping the rear of the saddle at the same height.
When you drop the nose, the back of the saddle will rise. You will want to lower the seat post just enough, so that the back of the saddle is at the old height. Small adjustments can make a world of difference with stuff like this, so I would move it just 1-3 degrees at-a-time, take it on a test ride, and repeat until you know what works best.
I had a similar issue, and that is how I adjusted my saddle. It took numerous adjustments to find the position that worked for me. The right combination can relieve that pressure, and still not kill your hands. It is possible.
Hope you get it worked out. Let us know.