7 gal (approx 27L) brewtech chronical. Also includes a triclover sight glass and barb that I never used. I use kegmenters now so this is surplus to requirements.
$400
It probably depends a little bit on your preferred level of carbonation.
Having sat at that pressure for 15 days, it is likely as carbed as it is going to get at that psi.
I generally run my beers anywhere from 75-100kpa (approx 11-14.5 psi), but I am quite happy to drink beers at the lower end...
It depends what you are trying to achieve with your cold crash. I suspect most people are just doing it to drop as much yeast as possible out of suspension. For this it is simple - once you are happy fermentation is complete just drop it as cold as you can manage as quick as you can manage...
The simple answer is do whatever you can to get the greatest number of yeast, best way to do this depends a bit on what equipment you have etc.
I suspect Mr Malty is going to say 6 packs is a significant under pitch. Depends on date of manufacture of your yeast (irregardless it will still say...