32 inch bales stack nicely end to end and not put you over width if on the road. We try to make a 40lb bale and 32 inches seems to get us
there. Tight bales stack. I see no difference when stacking 30, 32 or 36 inch bales as we get all of those lengths when set at 32 inches
average length. If anything a 32 inch bale gives some breathing room for the bales, which I consider a plus.
We've started stacking on edge, cut side up, this year and really like it. Whenever possible, we leave the hay on our wagons, under shelter for
stacking another day and/or selling off the wagon. In as much as on edge stacking gives a 14 inch wide surface, we are thinking about making
a 28 inch long bale for on edge stack/pack out. We would stack on the wagon cut cut side up too - so if the load stays on the wagon, it's in the
right orientation. Our customers are horse folks and they like lighter bales, my back likes them too as I get older! We will try the 28 inch bales
if we get a second cut this year.
As to the side doors:
See the pic from the Deere 348 manual. The side wedges IMHO have the same outward push against the bale case as do the side doors.
Trying to error on the side of caution. I know this, when our late in the evening baling - bales got very heavy and extra tight from the oncoming
dew, when I released the side doors on the 348, the bale case popped, groaned, etc like a wood stove changing temperature.
YMMV
Bill