mixer capacity kitchen-aid hobart

Old question but archive not as clear as I need or have time to mine just now -- apologies for that.  I'm considering compromising my obsession of doing everything possible in a mano and dust off a 34 year old KA (Hobart era) mixer w/dough hook and 8.5" bowl for this coming weekend's breads.  I want to know how far I'm not getting in dough strength development by insisting on mixing by hand.  A long way I suspect, judging from my doughs' invariant flacidity.