So I've been ridding for about 3 years now, When i got my first bike (trek1.1) I was not very flexible and had no experience so the saddle to bar drop was minimal. The past year i bought a CAAD 10 and love it and the more aggressive ridding position but having been on it for a while I'm feeling a bit too upright. There are a fair amount of spacers underneath the stem so how do I go about removing them and lowering my stem?