These are realtively inexpensive AND do the job-FAST!
I am making a Hammock for a thru hiker and I have used the Hemming foot to my advantage, as I have built 4 versions trying to save weight ....it really is a great product for the $$$$ if you do a lot of sewing.
I have a rolled hem foot but haven't had much luck with using it on ripstop nylon because it keeps slipping out of the curl. It works okay with other (non slippery) fabrics. Do you have a similar issue with nylon or any tips on using the hem foot?