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Did they come with 2 wrenches? You should be able to adjust them by holding the bottom/top perch in place with wrench #1, and using wrench #2 to spin the top/bottom perch up/down.
yeah it has 2 wrenches, but the 2 perches wont budge, i push the top one on way and pull the bottom the other way and nothing, is there a hex screw i am missing or what or do i just need to pull and push REALLY hard i didnt want to strip anything