Quote Originally Posted by cncJim View Post
How do you pour it? Just on one side and let it flow down the channel to the other, or fill both sides at the same time?
If using the self-leveling epoxy method, then the only way worth pursuing is to have a channel between the two rails (sides) and ensure sufficient depth of epoxy to flow between them. If they were poured separately, then the sides would end up at different heights, potentially resulting in significant stress on the bearings when the gantry is attached, unless shims are placed under the gantry on one side.