Feb 7, 2016, 09:51
Johnsons of Hendon, long gone, marketed these in the 60'6, mine is homemade. Stand on the chain, pull up slightly, until you feel tension, bingo. Ed. See here,
https://www.youtube.com/watch?v=emgIGZG1z-A Ed.
https://www.youtube.com/watch?v=emgIGZG1z-A Ed.
To each his own!