Originally Posted by HillRider

One other thing. Cut the steerer long enough to stick up at least 2 -3 mm above the TOP of the stem and then use a 5 mm spacer above the stem to get the needed gap for headset adjustment. That way you assure the stem is fully supported by the steerer. That's important with a carbon steerer.

In fact, I cut my steerers to project 7-8 mm above the stem and use a 10 mm top spacer. It gives me the option of raining the bar height 5 mm more in the future.