I got the oils on Amazon. I think I actually got most of the stuff for the recipe from amazon. The Open Soda page has recipes for 2L batches as well.
You're also the first one, so no sweat - there's only 440 of us after all! :)
Thought about grabbing some from Amazon?
The recipe looks good. I don't force carbonate, so I'd have to adapt it for my seltzer + syrup setup: 0.5 Cups
into 1.5 Cups
would be flat as a board.
> Homemade Root Beer, Soda, & Pop by Stephen Cresswell
How is that book? I don't have it. What else have you made from it?
I'll be going to get my CO2 tank filled soon, and have been meaning to make a bunch of recipes before the Summer's up.
I'll share what I use. I'm not to sure what you would use to pressurize a 5 gallon water bottle, because even if you could find a cap that would hold the pressure, you have to agitate the bottle while filling in order to get enough co2 into it to do any good. And agitating a 5 gallon water bottle while filling it would be...interesting.
I use one of these https://www.amazon.com/Carbonation-Carbacap-Coupling-Carbonate-Fruit/dp/B01039C0Z0/ref=sr_1_10?keywords=carbonation+cap&qid=1555387830&s=gateway&sr=8-10
and 2 liter soda bottles. I have a 5lb co2 tank that I bought on craigslist from someone who gave up trying to make beer. It came with a regulator, some hoses, and the mating end to the cap I listed above.
There are a ton of different caps on amazon, but most of them are metal and I have found that the threads are too deep and I cannot get a good seal on the 2 liter bottles. While the plastic one I listed above has worked great for the last couple of years. Good luck!
So, I don't have enough experience to tell you myself, but one of the books I own (https://www.amazon.com/Homemade-Root-Beer-Soda-Pop-ebook/dp/B009NNU71M/ref=sr_1_1?ie=UTF8&qid=1546062713&sr=8-1&keywords=homemade+rootbeer+soda+and+pop) has numerous recipes including bark (and it usually specifies that the bark on the roots). Try checking your local library, they might have a copy.
I carbonate my own water using a 5# co2 tank and one of these on a 2 liter bottle, https://www.amazon.com/gp/product/B01039C0Z0/ref=ox_sc_sfl_title_37?ie=UTF8&psc=1&smid=A3EB9LRCOJ90E
it works quite well.