AC,
That is something I have yet to ponder on. What would be the advantage of top vs bottom?
I now have an idea to run 2 loops of 1/4 tubing 30 deep feet coming off a common manifold at the top, both sharing the same bore hole. It might be a bit trickier to get all that in 2-2 1/2 inch bore hole, but it will completely solve the lubricant issue.
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