I am using a Cleckheaton pattern Design 0033. I am knitting it for my husband and on a circular needle I have 328 stitches for his size. It's a lot to undo if I make a mistake. That is why I asked the question in the first place. I think I may take a section of the pattern and do a test run of a few rows first.
Thank you for your reply. I have just come to circular needles on a jumper I knitted for myself and just loved the overall smooth, seamless look of it