I wish you luck in getting in touch with Chris. He has a great product but zero customer service. I tried for months to get hold of him with no luck. Fortunately a friend with two systems helped me out.
I'm guessing you have a problem with the connection under the table. Didn't you get several spares with the package you purchased? I have at least three plus that many tubes for the top side.
Try going onto Amazon where he sells. I contacted him thru there and did a response. No help but it was a response.
Good luck.