My experience has shown that the best racking method is to siphon down to about 1/2 or so then tilt the carboy on a folded dish towel or something. I will set my auto siphon so the weight of the hose holds it about half way down the carboy. Whenthe winegets there, it is time to hold it about 1-2 inched below the surface till rock bottom. When I get down to the bottom of the tilted jug. I dont sweat a touch of lees being transfered.
Another technique I do is to transfer everything that the siphon will pick up. Before the siphon starts picking up much lees, I transfer the junk into another container. For my gallon batches, I use a 1 Qt. sanitized jar. For a 6 gallon Carboy youcan use a2 qt. pitcher with a lid. By doing this into tall recepticles. I letthat sit for a few hours, or a day. Then I siphon off the cleared wine from those lees.
Most folksaround here just rack and then rack again afterXX days, weeks or months. It's all up to you.
Enjoy your hobby, and remember, they have been making wine for thousands of years. The only way you will really screw it up is bad cleaning practices.