I’m glad you liked the guide, but I’m almost considering taking it down, as both Jamie at Franklin and I noted quite a few things are out of date in it and not accurate anymore.
I would say the concepts of how a kart “works” can apply to 99% of kart brands. How you tune the kart to get it there might vary pretty heavily brand to brand though (soft axle to free rear end on Kart A vs. hard axle to free rear end on Kart B aka OTK for example). But generally, you’re shooting for the same endzone no matter what kart you’re on, and things like caster and track widths are pretty universal in how they affect the kart, though maybe to varying degrees depending on the design of the chassis.