The SBB fins are all balsa, but are built up from 5 pieces of wood each - a 1/8" thick core with two 1/16" skins on either side. Each of the eight skins is two pieces. The core piece is skeletal to save weight.
I've been doing fine. I've been trying to get my CSXT Space Shot ready for Red Glare at the end of the month, but it's been difficult with the cold. I take it you've got a few irons in the fire yourself?
I was thankful NG-15 went on the first attempt. The next day I was able to head to Higgs Farm to fly my Lazarus on a J500G and meet the two TAPs who are reviewing my level 3 project.