It's something along those lines, and if you can use the vanilla keywords then it would be the best option. I'd right-click on those keywords and use Use-Info to get a list of what perks use them, and look at the conditions of the perks. Keywords are also used in recipes too, so you'll have to be careful that there's no unwanted effects. If you or noone else has solved it then I'll take a look later today in the CK.