Question

on the site http://hyperphysics.phy-astr.gsu.edu/hbase/mechanics/earthole.html#c1
the proposed example, does not state, but assumes the hole thru the earth is not concentric and/or parallel to the center of rotation. I believe, allowing the hole to be thru the axis of rotation would eliminate all this talk and concern about all the multiple bouncing off the walls, etc. My question: how can I get this above info to the creators of that page, and get them to address this possibility on that page. Referenced again http://hyperphysics.phy-astr.gsu.edu/hbase/mechanics/earthole.html#c1
thanks.