It is the bigger 30A 24V speed controller that blew when one of the two drill motors seized a while back.

I think the relays on this one are the 2 black boxes on the left hand side of the board they have something like NAiS ACP131 on them, dose anyone know were I can get these or something to fit.

This stuff is not something I would try but its bust anyway so I may as well have a play.