Our club made twister quilts a few years back, and then I made another one. The teacher gave us a plastic template with the criss-cross seam lines drawn on it, and a smiley face to show which side was the top. There was no fabric between each square as we cut them out. She had us draw on the fabric with the seam lines lined up, and cut out with a scissors. But I figured out how to use my rotary cutter. No one else did that. I didn't make a mistake, either, as in cutting too far into the next block. That would have been a disaster.
I started with 6 in. squares, ended up with 3 in. squares in each center that were "scrap". I made a checker-board border with them which was stunning.