After many months of research and planning I finally installed my WS-420 EQ and thought I would share it here and Tige Eoners Forum.
It took me a while to decide that I diddn't want the EQ uner the console. My son normally controls the tunes from the head unit from the observers seat. I really only use the remote to mute the audio when we turn around to pick up a rider.
With that being said this is what I came up with....
I started with a small pressure treated 2x6 and milled it down for the EQ