The only time I use my Janome is if I want to do a quick stitch on something or another. Other than that, I use my vintage machines.
I feel bad that you gave away your grandmother's treadle!! I'd kill to have my grandmother's machine...even if it didn't work, just for the sentimental value of it! No chance you can get it back? The one time I bought a machine from the "original family" (it had belonged to his grandmother) I let them know that if they EVER wanted it back that they just had to let me know... I'd be incredibly upset to part with it, but have strong feelings about family heirlooms....they're such treasures!