The sad thing is that I have already done the beginner's course! I am okay cutting small pieces like a fat quarter, but if I try to strip cut a WOF fabric they always seem to be buckled and I don't really know why as I use all the sensible techniques I was taught about walking your hand up etc. I am always astounded when I watch tutorials and the tutor casually zips their rotary cutter over a huge length and stack of fabric and comes out with perfect pieces! For me the whole process is painfully slow and disappointing! I think I will investigate these cutting aids and non slip products as I suspect part of the problem is that I don't notice the tiny movement in the ruler.