1) Your alignment starts at the track: ensure that it is centered in relationship to the slide rails and tensioned correctly.
2) Then place a straight edge on the floor against one side of the track that extends forward beyond the tips if the skis. (A straight 2x4 works well for this)
3) Loosen the jam nuts at the tie rods so you are ready to adjust the toe later by rotating the connecting sleeve between them. ** Tip... the inner tie rod jamb nut can be loosened/tightened by turning the skis all the way left/right and sliding the protective boot back to expose the nut **
4) Next, load the sled with your weight (perhaps have an assistant sitting on the seat)
5) Position the handle bars to straight ahead.
6) Connect a low tension bunge cord from tip-to-tip of the skis to keep slight pressure inward.
7) Measure the distance from the edge of each ski to the straight edge. Do this in two places as close to both the front and rear of the ski as possible making sure you are measuring to places on the ski that are on the same line (straight to each other).
8) Most of the time you want to end up with a 1/16" greater distance measured at the front of each ski than at the rear. This will get you a total (1/8" toe-out) ending measurement. I say most of the time a toe-out is desired but the opposite (toe-in) has been found to work best for some skis (Slydog Powderhounds for one). 90% of the time toe-out is what you want.
9) Once your desired measurements are achieved tighten up the jamb nuts and recheck.
10) You're done!
HTH!
