When I clicked on that photo, I was taken to photo albums posted by poacher110 on photo bucket in 2011. However, the photo posted by David W. in the reply above is not like what my FA iron and visible parts look like, and it appears to me, based on other photos posted on photo bucket, to be similar to that of an 1899 First Style Release instead of a Curtis, if I read things right. I did find a drawing on photo bucket that seems to match up with the parts I can see on my FA, it is labeled Auto Ejector (E) System Part 10-RE, drawing #431, shown below, although my FA iron appears to be for an extractor, not an ejector model, as it has an extractor actuator.
On the inside of the slot ahead of the forend spring there are two projections, one on each side, that move sideways out of view when the button at the end of the forearm is depressed and spring back into view when the button is released, as if to pinch a lug on the underside of the barrels to help hold the forearm in place. These projections seem to correspond to a part called a spring lock 41-RE, also shown on drawing #431, and see green arrow in photo below.
From the drawing, it appears that the button does unscrew from the shaft, but I canít get to the threads to put any kind of penetrating oil on them. Is this mechanism strong enough to grab the button and unscrew it? Again, any advice will be greatly appreciated!
Oh, and I did find a photo on poacher110's photo bucket pages showing what I think is the proper orientation of the cocking plate and how it should be held and slipped into the forearm iron slot.
Does that seem right to you guys? The posting of all of these and many more photos is a tremendous help to guys like me! Thanks again!