Askomiele, You can hear liquid sloshing around after the spin because the spin tub has a liquid filled balance ring mounted around the opening. If you spin the tub by hand, you'll hear it moving around in the ring.
The duration of the wash tumble and pauses between reversal of tumble directions is different depending on which cycle you have it set on. For normal wash it is around 50% wash and 50% pause. On handwash, it's more like 30% wash and 70% pause.
As far as having a window in the door, I've been playing around with that. The problem is on the older units, there is a vibration counterweight mounted inside the door liner. The newer 5500's don't have that, I believe. I'm 'modifying' an extra door to try the window idea... We'll see...
Again, congrats to Ben the Neptune man...
RCD