I finally got my XCR tactical, and I have wanted to put a laminate wood thumbhole on it for a while, and the one that is advertised at Stocky's comes with an aluminum bedding block, which they say is a very nice setup and works well in regards to accuracy. However, another guy said don't use the aluminum, only use glass or pillars. I am sure that I can find the stock without the aluminum block, (which would also be much cheaper) and have someone bed it themselves. What route do you recommend and why?