In an earlier post, I described what I did to get Cooper rear-facing in the front seat. When it was time to flip him around, I continued to use the LATCH system to secure the seat. I also attached the top tether to the shoulder harness anchor on the ceiling. This worked well. Unfortunately, Cooper grew out of that seat, so we needed something new. Most of the booster seats appropriate for a 3-year-old have side-impact head protection, which is great for cars, but interferes with the headset. Fortunately, we found this one, which seems to work.