It looked to me like station 1 was occupied by a Lee decap die. I just wanted to make sure that you know that resizing is done before trimming, as the resizing die tends to make the brass longer.
Also, take a look at the brass after it comes out of the swaging station. The backer rod on that Dillon .223 backer die has a shoulder that expands the case mouth. I found that weird and unacceptable, so I turned the shoulder down after Dillon tech support confirmed that it is in fact designed to expand the case mouth during primer pocket swaging. This shoulder may make your M die unnecessary if you want to end up with flared case mouths.
Also, take a look at the brass after it comes out of the swaging station. The backer rod on that Dillon .223 backer die has a shoulder that expands the case mouth. I found that weird and unacceptable, so I turned the shoulder down after Dillon tech support confirmed that it is in fact designed to expand the case mouth during primer pocket swaging. This shoulder may make your M die unnecessary if you want to end up with flared case mouths.