The rubber is easy to cut with a straight edge and new xacto blade in your knife. It takes a few passes but it works very well. Rubber must be well cleaned as I mentioned before. It doesn't hurt to touch the edge with a Dremmel drum sander to expose fresh rubber. CA glue works best on fresh rubber.

The weight on the thing is quite reasonable at less than 4 ozs.

I still have not run but will soon and post photos at that time

Matt