Slight thread drift, but others brought it up in response to original poster....
Ive wondered about overstuffing from an alternative angle. If i get a 30 degree bag and the down shifts, people will say "Next time get it overstuffed."
If billy bob the next day comes in here and says he also got the same brand sleeping bag, but in a 20 degree version, oh, and by the way, his down shifts.... People will tell him to get overstuff.
Well, if the overstuffed worked on the 30 degree bag... Why would a 20 shift at all. It shouldnt if overstuffing worked on the 30.
You know what I think. Continous baffles suck. Period. I have no experience with thr karo baffle system. but in general, I think, outside of getting in between temp ratings, overstuffing is a marketing tool and gimmick.. Od course, if you stuff enough down in a limited area, at some point it will not shift.
I literally have not had a 15 degree bag or warmer wirh horizontal continous baffles keep down from shifting around the shoulder and chest area. EVER. I think most people either just dont notice and have warmer then needed bags. And i am hard pressed to figure out how so many people claim continous baffles is a feature - and not a liability in most common situations and needs.
I applaud EE for trying to impeove down migration by changing baffle spacing. Personally, i just dont see why more bags just dont have chambers in their baffles or the karo baffles without the opened space at the 4 corners, in both cases, to keep the down inplace.
Seriously, how many people really need to move their down so much. Ive used my 0 into the 40s without moving any down. I can kind of see a 30 degree bag perhaps, trying to stretch it into the high 50s or 60s... But for the life of me, i cannot understand why so many people just accept the ability to move down as an accepted, universal feature... But never get tired of waking up cold and having to push their down bag into place at night. I guess some of you sleep totally still... Or its just me!?