A quetion for the techies,

I use a peep sight with tubing. In the past, i've alwaysattached itto thecables. The other day when I was at the archery shop, one of the techs said never toattach it to the cable, but instead to the riser, asattaching it to the cable will effect the timing.

Do you agree? Will it make much of a noticable difference? Thanks for the help.