You might get an alright result; 33% is definitely close, but toward the bottom edge of what you want to be doing (40% is off from memory, but it's within a few percent for sure). I would guess that vodka is being used in more recipes since everclear isn't legal in all that many states... and some states just call the highest proof allowed 'everclear' even though it's not (like a lot of the 151 proof limit states). I'm talking about food grade extraction, which would be pure alcohol, not intended for direct consumption as a beverage.
Definitely do the scrape next time, try 40/60 or even up to 50/50 (ethyl alcohol is still the better solvent, chemically, than glycerol). I would also highly suggest not evaporating the alcohol until the juice is intended for consumption. In the extract stage it'll be more stable & keep for much longer, in the juice stage, it's less of a risk, but it's still going to be helpful for stability & longevity. Just like the store bought juices that you have to leave uncapped overnight. There's a reason why they make the consumer do that - either they're fresh & it hasn't had time to evap, or it's not fresh & they left it in for longevity.
Actually you just saved me a step and that makes me happy, I'll just draw directly from the container and let it evaporate on it's own after mixed