Ted Fry,Has been useing it on Self and backed bows for years.He said he has used it on self bows without overlays on many of his sold bows without problems.As a matter of fact,he told me,he has tried strings from just about everything you can think of,Primitive and non and has come to preferr the non stretch modern strings.Personally,i use b 50.There is no reason,you couldnt add B50,into the loops,if it worries you.