If you're serious about oak I recommend Barrelmill oak spirals. Reserve 25-30% of your wine and oak the remainder. Oak adjuncts are not like barrels and infusion can be maximized quickly. That means it's very easy to over oak, and that's why you reserved. Once you achieve the profile that's...
Carboxy Methyl Cellulose. Google it and consider it. Saves tons in time and guesswork. Used in Europe for years and now approved for use in the US. A very nice alternative to traditional cold stabilization.
I have 9 @ 5 gal carboys to sell. 5 have fluted tops that require a 3" bung - purchased from Abbott Labs in NE Illinois that were previously used in drug development.
All are glass and all are in excellent condition. 4 of the 9 are the standard water cooler style.
Local pickup...