I have a 400/205. With the Gen II I would have to get a 203 and use the 205 adapter between the 400 and 203 and drill new holes in the 203 for the 205 adapter. Then the 205 would bolt right to the ord adapter. Is this correct? So all I need to get is a 203 and the Gen II kit and I can hook this all up. Does it matter what the 203 was bolted too?