1906 vs 1908

[DonVoigt]

Originally Posted by Karl

This photo illustrates what I was trying to explain about the cannons

Thanks for the picture, it clearly shows the difference.

But, the difference does not affect the interchange of the upper to lower. The rails are the same width as the "ears" and thus would pass through the same area- but they don't come back that far.

I just tried several early/ late combinations and confirmed the above conclusion. There may be a combination that will not work, but I have not found it.

I'd rather think the the longer curve of the later receiver aids in re-assembly- making it easier to start the receiver on to the frame rails.