Yep, that's what I used. Can't remember the effect immediately after adding the syrup, but
after the second 40 day wait, mine was golden and clear.
I was a bit disappointed because I actaully wanted the lemony-colored version and this looked more like a golden brandy. But the taste was amazing.
I tried a shorter version the following year (3 weeks versus 80 days) and used a single bottle of vodka. That one ended up more yellow and opaque. Visual was better, but the taste wasn't as smooth.