Trust me one wp-25 is overkill in a 40B. The only modes I was able to run without it being a complete sand storm is in W1. I also have a 40B
BTW************ you can use a 12volt supply ( I used mine off an old router power supply) and I can now run all the modes including Else mode. If you want the nice waves you might want to stick with the power supply that comes with the box, the 12volts just isn't enough to make a nice enough wave imo.
I appreciate it! I'll prob stick with the normal power supply, but will most likely just use w1 at the lowest flow rate.