I decided to fill the can with 4 metal pan scourers, less than a pound for 6 of them from Wilkinsons and cheaper than a few metres of chain. Also decided to have the connectors coming out at an angle rather than straight down as i reckon it looks better and was easier to keep the tubing together.
Pics taken on phone -




When the weather warms up, i must have a got at tacking the rocker cover.