in addition...
aldspinboy, the water level is adjustable. There are 5 preset levels, you can always adjust the level up at any point in the cycle. If you want a level in between just set the machine to the next hight level and when it reaches the level you like, adjust it down - both sets of level lights will flash. Easily done, but I don't know why you want to, the five presets are all you need.
As to the dispensers diluting the product, why is that a problem? The bleach dispenser dilutes when it is adding in the product, not before - same with the fabric softener, kind of a non-issue to me.
AS to the Tub it is perforated all around with one ring of holes at the base of the agitator, it is original and I purchased it in 96. I'd guess the triple action of the agitator is due to the fact in addition to the normal function, it had the swirl around the center to help bring the clothes down and with very large loads the spring action raises the agitator and forces the top portion of the load down.
If anyone has any other questions on this machine I'll be glad to answer to the best of my knowlege....