If you use this method to pour directly into a glass and it foams too much then maybe you're over carbonated in the keg?I can't seem to get anything but half a bottle of foam with this method. I just swapped out my 6 ft lines for 10ft but I've been keeping my PSI down low, around 2-3. Would that be the issue? I have made sure bottles, line and cane are all cold too. Seems like if I were to continue filling until the beer gets to the normal level I will be wasting a lot beer just foaming over.
You're asking the right questions. I've bottled several award winning beers this way.