@SLM I also wanted to ask what your definition of flabby is? How would you describe what they are lacking? Flavor/fruit, tannins, aroma, acid, structure? Do they just taste flat and thin without body? What exactly are they lacking that your other kits do not?
The double skin Forte PS kit I made actually ended at a lower ABV than the Tavola CS.
What was the ABV of the FWKs you made? If you followed the instructions, they probably ended around 13 to 14%. I would assume they would taste less sharp compared to the other kits you've made at 15 or 16%. Do you think this is a contributing factor?