I've been researching a smaller set up for my Dad and brother. They help me brew (great way to get the famn damly together) but only drink it when they come over as I only keg the homebrew. I thought a small system like the 5L or 2.5 gallon kegs would work well for them. I've read too many...
I've had some similar specs floating although maybe a little smaller in size and it didn't affect the beer taste. I also used a 6 gallon carboy and it had a good bit of head room in it. I switched to 5 gallon carboys for the secondary fermentation and haven't seen it since. So it could be head...