BleuRose, I can think of a couple options. If you used the same machine with the same presser foot and all blocks ended equally slightly larger, you could just use them as the actual size and make triangles based on your new slightly larger block. Or, If it is just a little bigger, I make a vellum (see thru paper) or tracing paper square 6 1/2 inches and
mark the vertical, horizontal and diagonal lines on it . I center it on the block. I lay it on top of the block and use clear tape to hold it and the block to the cutting mat, and then
trim. You can see thru the tape, and use your vellum over and over on all the blocks. The blocks do not move while cutting because you put tape on all 4 sides. My picture
is not a slightly bigger block, it is just one of my blocks from the TQS BOM to use to show you what I am talking about. The third option would be to make the seams slightly
larger if you have access to them without total deconstructing the blocks. It would help if you took a picture of a block sample on your cutting mat. Lay on the lines so we
could see how much you are talking about squaring up. Hope this helps. HelenW