A number of students practice Kailis Ilustrissimo world wide. Besides Diego and Rickets' book, "The secrets of Kalis Ilustrissimo", there is relatively little literature published on the art. there is information on tatang in Gelangs "masters of the philipino martial arts", and Gelang also uses ilustrissimo techniques in a few other instructional books such as complete sinawali. This list isn;t exhausted but when you compare video and literature as compared to other martial arts like karate there is very little around. As practitioners are you interested and willing to pay for well produced informative photograph instruction manuels on the subject?