It is the MIY Studio where two groups of us went in January and February to do the dress pattern workshop, which was brilliant. I can really recommend her courses. Keep on the lookout for more courses in the later part of the year because some of the classes in the next few months are fully booked right now.
Follow the link to the Seam Jig tip here.
I love the photos she shows and also the very useful explanation of why your sewing machine stops sewing at a bulky seam (and why this piece of cardboard helps). I would believe that it works without knowing this, but it's so much more beneficial when you understand how something works! More satisfying too.
Do you have any tips on how to deal with bulkiness, or little tricks relating to seams? Please post them in the comments!