@wjrh Have you got a rubber seal under the headset cover (the supplied Caad12 HS cover has this built in)? I couldn't pre-load mine when I slammed the stem (replacing that massive HS cover) without it. I spent a solid hour fruitlessly tightening and micro-tightening to fix it. Took it to Mud Dock and they dropped a rubber seal over the steerer onto the headset, in order to raise the cover away from contacting the face of the headtube before the pre-load was set.
@wjrh Have you got a rubber seal under the headset cover (the supplied Caad12 HS cover has this built in)? I couldn't pre-load mine when I slammed the stem (replacing that massive HS cover) without it. I spent a solid hour fruitlessly tightening and micro-tightening to fix it. Took it to Mud Dock and they dropped a rubber seal over the steerer onto the headset, in order to raise the cover away from contacting the face of the headtube before the pre-load was set.