Originally Posted by Melinda in Tulsa
This is a suggestion I haven't seen mentioned here for those have trouble with puckers when SITD. If your machine has adjustable presser foot tension, you might try loosening that some so you presser foot isn't putting so much pressure on the extra layers. Just a thought.
I used to have few puckers on the cross seams after I had SIDed all of the lines in one direction and then quilted the other direction. The only thing that prevents those is if the sandwich is really taut and has no wiggle room to shift side to side.
If you pucker on the initial seams, then your idea might work.