One last thing to be aware of is the "pipe runout". That is the allowable amount the fork tube (or pipe) can be out of true, or straight.
Imagine if one or both of your tubes is not perfectly straight by .20 and then imagine that one tube is "bent" forward and one back. When you bolt everything up tight something is going to stick, or at least not slide smoothly.
The best practice, in my experience, is to verify that the tubes are straight before assembly. Then after assembly but before installing springs, bolt the front assembly solid with the axle and verify that the whole assembly slides full travel without any resistance.
If you do find sticky spots it means that the tubes are not perfectly parallel. Rotating the tubes sometimes will solve sticks.
With luck they will be perfect, but when they are not the ride suffers and wear increases.