Filament Guide post - 20x20 top rail mounting

Was installing a top mounted filament spool mount and need a ***Filament Guide***. The top mounted filament spool holder was: Kossel Mini spool holder featuring Emmett's gear bearing. by ChrisParish, published Sep 7, 2014 https://www.thingiverse.com/thing:454808
Remixed with a Larger mounting brackets for top spool holder: by RCC1, published May 13, 2018 https://www.thingiverse.com/thing:2909223

The guide is nothing special, just a mounting pad, guide tube, and pedestal (with hole up t