The public 'identification' was largely due to the aspersions by Marchamont Needham, the author of the newspaper Mercurius Pragmaticus.
The Levellers hoped to base England's new constitution on the Agreement of the People, but in the end, the New Model Army based their demands on an alternative less revolutionary document, the Heads of Proposals, that was proposed and supported by the Grandees (senior officers) of the Army.
Various devices are employed in order to achieve this: dock plates, dock levellers, dock boards, and various forms of lift.
Johnstone also heads the popular all-star musical festival act,"The Fabulous Good Time Party Boys", which features members of the Levellers, Irish singer/songwriter Dan Donnelly, American musician Roy Harter, and two of his children, Alex Johnstone and Emily Johnstone.