Neither have I. They said they were better than zebra, but not as good (or expensive) as wc (which they also carry).

Another shop sells vapor trail. Do you know anything about them?

THe string is old and crappy anyway. Its the string that came with it. It has a little nic in one strand and is a little frayed in places. The center serving is a little worn too.

Im sick of twisting peep sites and I'm sick of the noisy tubes. Mine was pulling to the right from the cable anyway and it really bothered me.