After looking and watching videos, I'm going to have my husband modify one of my 15's so it can be a dedicated embroidery machine. First thing will be to solder up the thread guide right above the tension dial - I have problems with the thread popping out of that one and then not feeding into the tension correctly. I've been putting a piece of tape over it to close the hole.
Then he's going to take a presser bar and chop off the end so it's up out of the way - can't remove it completely because of the tension release. I'll make a large wood surface that will fit around the case, as I find I need to have the machine up higher when doing this - otherwise I find I'm hunching down to be able to get my eyes closer to my work.
Kind of funny - I have a Pfaff embroidery machine I bought used early this year - and have never done anything with it. And now I'm more excited to learn how to do it all by hand.