I have been making my strings for a couple years and use #3 BCY serving thread for my loops. This may be right or wrong but this is what I do. To make a good set strings and cable, it takes me several hours. I thought I would try a set of factory strings and ordered a set from vapor trail. I notice on the loops they don't use serving thread but wrap the loops with what looks like bow string material. Is this a common practice for good string makers. Does anyone else do this?