My main machine is a Janome 7700 and for class I have the 3160. I went through a series of Jems before I got the 3160 and I was forever fussing about missing functions. I never switch machines during a project unless I use my 3x5 note card to make sure I have the same 1/4" seam. I had to do some major ripping on a project cause things did not fit moving between my class machine and my home machine so now I set things very carefully rather than eyeball it.