When I took my first quilting class, I was taught not to make a knot in the thread. I was never comfortable with that. I was taught it made the fabric too bulky where there was a knot. So, on my first attempt (9 blocks) I didn't knot the thread. I never finished that quilt because I am still uncomfortable with there not being knots in the thread, feeling like the first time it's laundered, the blocks will come apart. These blocks were all hand quilted. My question is, to have peace of mind, should I go back and restitch these blocks on the machine so I'll at least "think" they're more secure? I don't want to finish these into a lap quilt or anything else the way they are. I've stuffed these back for about ten years now and I want to do something with them and get this UFO out of my way. What's your opinion?