Peep on the left is tied into the bowstring, by using the groove around the outside of the peep.
You can see the NATURAL size of the triangle above and below the peep.
Peep on the right, has the triangles CRUSHED, cuz the fella put in LOTS and LOTS of serving
to CRUSH the triangles SUPER SHORT, to make sure that the peep DOn't MOVE.
Well, the peep DOES move, it rotates like crazy...when you serving the peep above and below, and CRUSH the triangles. Don't matter HOW much you spend on custom bowstrings, if you serve the peep above and below to CRUSH the triangles, you just CREATED peep rotation. Not the fault of the bowstring maker.
If you just GOTTA serve in the peep,
serve ONE LEG of the upper triangle
and
serve ONE LEG of the lower triangle. DO not CRUSH the triangles above and below the peep. THEN, your pricey custom bowstring, that had ZERO peep rotation before you installed the peep, will still have ZERO peep rotation,
after you serve ONE LEG of the upper triangle on the bowstring above the peep,
and
after you serve ONE LEG of the lower triangle on the bowstring below the peep.