Hi William, Thanks for the comment. I'd better set the record straight here! My stitching wheel (maybe I'm calling it the wrong thing?) is pictured below. It is a very basic tool but but does the job. I find it very hard to make a straight line when marking out, and it marks the leather. I do need to slow down I think and that might help. I'll also experiment to see if I can run it along a ruler to help keep straight, but that will only work for shorter lengths. The problem for me is that I find it very hard to see exactly where the wheel is contacting the leather unless I look from the side - and that instantly makes my hand go off course!! That's why I was thinking the pricking irons would be better. When doing saddlery items we used a groover to mark the course for the stitching and the stitching wheel was easier to control. I don't think the groover will be a good idea on finer and more detailed work - but Phillip please comment if this is wrong. (Also, this is poly thread - i am not hand rolling linen at the moment - and probably wont either :) )