I have only made one kaleidoscope quilt, and don't know if I'll ever make another one. But I used a tool that I haven't seen anyone else mention. I went to a local quilt shop and found a mirror that was a HUGE help! It actually is 2 mirrors connected in the middle with a strip of plastic to form sort of a hinge. When you place the mirror on your fabric, the multiple reflections show you exactly what the block will look like once it's finished. 🙂
Donna