The amount of sugar or glucose you add to your mix is not very much compared to the 1/4 teaspoon I was dosing every three days. Certainly dosing sugar or glucose by themselves can be overdosed much easier then vodka or vinegar. IME, glucose can be overdose easier than sugar. 
Cliff from your observations could you now conclude without a doubt different organics lead to variations in bacterial growth? If so would you hypothesize that using a multimodal approach with organics could potentially offset any negative detrimental effects that could arise from a single source in high abundance?
I started the VSVVc a few days ago. So far everything is looking good.
Welcome to the darkside. You may never return.