Did you know that this is a viable mister combo?
hh spsp hh
sp sp
sp sp*
hh spsp hh sp sp hh
* sp sp
sp sp
hh sp sp hh
hh = channel
sp = half a screw pump.
* = gear assembly (the regular setup for powering the mister changes. The key is to isolate one pump in each ring. Several ways to do this.)
This setup is cool not because it describes a figure eight when operating (what I was originally going for), it doesn't, but because you can set it up to switch from one ring of misters to the next upon command, by isolating the power to one of the pumps in each ring, so that you can switch that individual pump on and off. (its always one of the four central pumps, which one depends upon how you set it up)
So, for example you can have water or magma spinning and pretty much instantly switch from an open pathway to one that has a mister operating over it. Useful for fortress defense.
So then this mister setup is also viable.
hh spsp hhhh spsp hh
sp spsp sp
sp spsp sp
hh spsp hhhh spsp hh
The two rings spin water/magma independantly of each other. The pumps take the fluid too quickly for it to disperse into the adjacent central channels.
This is kinda cool because (using the first setup I detailed) you can create a two tile wide hallway into your fortress that switches from a water mister to a magma mister.
I haven't tried this part yet (no magma easily available at my embark site... yet) , but if you put a two tile bridge full of water over one of the double channels and drop the water while the misters are spinning magma, I'd expect it to instantly create a two tile wide wall across the entrance of your fort, hopefully sealing it off completely.
I also haven't tested what happens when you push magma into a mister that is spinning water. That could be cool.
Sorry if this stuff has already been covered. I did a cursory search and didn't see any of this mentioned in the popular mister topics on this board, (I didn't read through them all completely that's the cursory part
.