Just go with the book design simple and strong parts readily available just set your preferences when making the jig
As an aside I used inner end rose joints on the lower wishbone and then shimmed to get the caster that I needed to help with the centering also combined with the upper drag link adjustment I have a fully adjustable front end now
From my trials extra caster and to much toe in made the front really nervous now I have almost zero toe and it feels great with centering to boot
Gary