As I will be using this for a cake size portion, I notice that you use 11/2 tsp of flax seed instead of a Tsp. (I'm so used to whole "eggs" in my recipes). Would it make a difference if I used an "egg" measurement (1Tsp. flax to 3Tsp. of water) in the recipe?

Also, can I replace apple cider vinegar for white vinegar?