I used to use the peep sight with tubing attached to my cable. Did it with no problems and fine success. Did hear stories about the tubing break after a few years of use but I never had any problems with it.

Then I went to the No-Peep and gave it a try. Very happy with the No-peep. Man it makes for some tight groups man. Takes two men to set it up but worth it I'd say. Not trying to sell anything here but I'd recommend the no-peep.