Harvey is the coolest dubs engine (https://largescalecentral.com/externals/tinymce/plugins/emoticons/img/smiley-cool.gif)
Although, he looks a bit self conscious about his erection.
Ah ha.
I don’t think the Dubs used any form of “tie downs” for stability. Just a low centre of gravity, a dirty great counterweight on the back end of the jib and a bit of care on how much load you put on it.
Max, thanks for the info. Now you mention it, I can see the “dirty great counter-weight” on each crane!