to over come much of the "give"...I usually add an extra spring, theres already the slots for it, the orbital seems to "jump" a lot, and the extra spring holds it tighter, to really moved the agitator, you can even test this by putting a small board (like a broom stick) between the motor and the front suspension spring, watch the wash action, and with your foot, apply a little more "pressure" to the belt, and watch the agitator speed up a little and stronger, and then you'll see why the extra spring helps, and doesn't let the load make the system give in, I have asked about adding the spring and the damage it may cause, all they said was that it could cause the motor to burn out a little sooner but not much, I have done this on every maytag I come across, except for the "50hz upgrade", that made it too tight, and the motor over heated during the first spin and shut down, but i never had a problem with all the other machines... after putting the orbital powerfin in the helical small tub, I then put the helical powerfin in the orbital machine, added another spring, now this may be different because of the smaller tub, but it handled a jean load nicely...so I would say I have 2 happy maytags.....
my sisters SQ was a large capacity, it would wash a goodsize load, the nice thing about SQ was as the tub got bigger, the vanes also changed, not just taller but the bottom vanes increased, only about an inch or two, but unlike maytag, kenmore, GE they only added 2 inches of height to the agitator and brought the top of the vanes with it, it just to me a taller tub needed a bigger agitator to compensate, as well as a longer wash time than the regular capacity...but back to SQ small tubs, I always thought the laundromats only had the small tub, because of what they were meant for, then I found out later, SQ never made a big deal on the control panel about being EX-Large capacity, It was built in to the time fill to add an extra minute of fill time for the larger tub, only way you knew the size was by opening the lid and looking, odd things we just notice, I never like maytags as a kid, because could never seethem wash, even though all the guys in here recommended using a stick or similar item, at our laundry the attendant was always watching you, I tried to peek, but couldn't see much, and I had to know how the machine was washing, not when you open the lid and it stops!...but thats just me