Tuning Need help with the copper tube on twin bottle hercules in 45 cal.

I was working with Robert Lane to get the hercules regulated. He was putting a kit together for it but due to health issues I hear he had to close up shop. Everything is done except for the copper tube from the rear bottle. Is there anybody on here that makes these or can help me in any way would be greatly apricated. Also hope the best for Robert from Lane regulators.