Denny, you can subscribe to a thread by clicking on one of the blue "
Subscribe" buttons. There are two of them on page - one at the top, under the title of the thread and the other at the after the last post to a thread. That way you will receive notification when someone has responded to a thread.
I answered your other thread
How Do I Tell? You really have to look at the bobbin area to tell the difference between a 115 and 15. Yes, your machine is a 115 according to the picture you posted on that thread.
A good post about differences can be found at
Singer mdl 15 vs the 115, what's the difference?
Janey - Neat people never make the exciting discoveries I do.