Hey guys - I have a 2011 CAAD10 105. Newbie wrench question for you. It still has the stock headset with the 25mm (I think) cone along with some spacer which I currently have above the stem. If I wanted to slam the stem, not saying I do at this point, what would I need to do? Do I need a new headset? What replaces the cone? I'm slowly lowering my position but have reached the limit imposed by the cone. Thanks!