Raven AC

I have a Raven AV with one motor and one arm board; does anybody have any experience with fitting a second arm board.

Hos is it done? The positions for them are plain stainless steel with no threads to fix; do these come off?

Thanks for guidance
You need to order the bits and pieces including the armboard with type of arm you will be using from TW or the dealer.
Call Jeff of Highwater Sound in New York he is the distributior. He is very helpful!!