The Code Red might not be as forgiving, as the sail shape and cams are mast specific. However, I was able to set my Code Red up for a north drop shape mast using smaller cams (thanks to a few peoples tips on here). It goes al-right.

It's completely irrelevant, there's no Ka sails on there!

Phil, Personally found the Unifiber chart a bit more useful - has more brands and allows you to see the subtle differences.

I would only use it as a general guideline as manufactueres spec will vary even within a brand. i've used a substitue mast and it worked but nowhere near as well as the reecommended one.

Without knowing what data was used to colate that first chart and on what basis they are assessing suitability it would be pretty hard to take too seriously. It is blatently obvious to state that if at all possible you should use the mast recomended by the sail brand but the fact is they are the masts the sails are designed to work on. Yes you can substitute and in many cases quite successfully but you need acurate information before doing so.
Smaller wave sails due to the lower luff curves are a bit more forgiving, with larger race sails I would be vary wary of using anything but the recomended mast without very well informed advice.