This may be a stupid question but here I go. Is there any benefit to having a drilled bung or stopper as opposed to having a 2 hole carboy cap?? I've got both and have noticed that with the stopper, during fermentation, the stopper will rise a bit. I now have a couple of caps for my 6.5 fermentors and am going to give one a try on my brew this weekend. From what I understand about the topic, which is limited, the cap gives you the option of having a blow off tube if needed where the stopper will not.
Anything other than that??
Thanks guys, please be kind.