The Black Dragun is the same exact gun as a Rex R2 or an Odyssey Torid X. I'm not sure why they had 3 different names with slight variations. I currently have a rex r2 I'm trying to get back in working order. If everything is fine and you can't figure it out, there's an alternative solution to the board. You can go to the website below and purchase an 03 T-Board. I purchased one because the rex r2 im trying to fix had a fried board and need to get the noid to connect.
Just email the guy because the website is kind of ****ty.