I discovered this 2 years ago working on placemats. Bought a new light weight Baby Lock Maria and took it to class and completed one placemat. Finished up the other 3 at home on my Pfaff and my Pfaff mats are noticeably larger. A friend told me I needed to buy a 1/4 inch foot so I did and evidently it matches the 1/4 inch Pfaff foot as I can now go between the two machines without a problem but what I did was sew a seam on each machine and measured before I started our mystery quilt at class. This time I was able to go between the two machines with ease. I agee, the tiniest bit difference can make a pretty big difference in the outcome so when going between machines, measure, compare and know what you're working with. If you can't go between the two, you can still use the travel machine and complete the top or project at home with it. Not ideal since many of us have much better machines at home than what we travel with. Glad you caught it when you did.