Browsing some of these designs today, there appear an awful lot people keen to re-patent the wheel as their own, numerous little brackets and bolted on bits that many here would take for granted quite honestly,
there are a few I reckon might have some application
this;
as a kit you could install to
anypickup and remove to refit maybe, this has been mentioned enough times here as a lining up device but never as a locking tool