Tarm 40 solo plus. Second year. It is getting cold around here at night... 30's and maybe 20's tonight. My goal is to install turbulators. I have some old 3/8 chain... what length should I use? How much of a difference will it make if the chain is 20 inches?, 30 inches? or even 10 inches? If it is over 29 inches... ( length of tubes) will this have any adverse effect on the Tarm? I did the search and I like the idea of welding 4 together at the top... to make it easier to take out. Any other good tips?