I watched a YouTube video on racking and it looked like he out the auto siphon all the way down to the bottom of the carboy. I’d think that would suck up the lees, no?
I thought it would be easy to rack but now after watching the video I’m a little confused.
You want to stay away from the bottom, correct? Get as low as you can without drawing that lees out, right?
Are you bottling this? there is no real good way to back sweeten with bottling as the additional surgars will ferm out completely unless you add potassium sorbate. If you use potassium sorbate you can’t bottle. Its a catch 22.
There is a glycerin product that is supposed to add sweetness without fermenting but I have never used it. Therefore I have no idea of how much you would neef.
If you decide to bottle (thus not back sweeten) there will still be plenty of yeast in suspension to bottle. It is important to make sure the ferment is over before racking or it will stall. If you age it for over 6 months you may want to consider adding more yeast.
Bottom line get a kegging set up, use potassium sorbate, back sweeten and force carb. Thats what I do!