You would need to start with vodka in order to have the full experience! Our Gin Making Kit turns vodka into gin, so if you were to start with gin then you would just be changing the flavour profile slightly.
If you only have gin then you may prefer to use our Gin Infusing Kits, which are designed to flavour plain gin.
If you were to add our (1 batch) Gin Making Kit botanicals to a plain gin then it would probably end up tasting more like a heavily spiced gin, something like Ophir, after a day or two. You could always add some botanicals in and give it a taste every day until it has reached a level of spice you like!