It's my first time brewing a Flanders Red (Jamil's AG recipe from BYO) using White Labs Belgian sour mix 1, and it's almost ready to transfer to secondary for conditioning. I have a 23L glass carboy but only have 18L in the FV, and wondering if this much headspace will be an issue over the 12 months I hope to leave it. Should I give it a quick hit of C02 to form a 'blanket' over the liquid, or am I just over-thinking things? I'm also going to put about 30gm of french oak mini staves into the carboy for the duration, and wondering if I should split these to provide more surface area. It's my first time doing a sour, first time using a glass carboy & first time doing an extended secondary conditioning, so all advice/tips welcomed.