Yes and i agree with this but then if you don't take the time out to take this newly learned knowledge back and apply it to ki bohn soo then what have you learned??, nothing! Everyone is so caught up in a time to achieve system that many don't even realise. As much as we try to be individuals within an art sometimes we are promoted just through fear. This could be fear that we are being left behind from us, or fear from our instructor that they will lose you or other people because it is not seen as an art you can progress in. This is my understanding of what choi was kind of saying in his post that although kuk sool is not the same as any other art, them all being unique. To the lay man who looks at it as "I want to learn martial arts" the system that offers a black belt within 3 years as opposed to one that would take 7 years to master will be chosen everytime. The person does not analyse the system they just see the end product and decide that a black belt is a black belt. Therefore in a consumer market there is always outside pressure to have a system that promotes people through its belts. Its the old problem of people having to pay their mortgage, and feed their kids i'm afraid. Also the point that the future techniques help you understand the previous techniques is true, but if you are learning more about a previous set from a future one than the primary set teaches you about movement for the "more advanced" set then surely the first set weren't known well enough in the first place. That is like being taught the basics of driving, going ok i can change gear, and work the pedals, lets go race at Daytona and learn how the basic mechanics of driving work.............. maybe???? I don't think that you are meant to get many things within kuk sool on the first look or even the 10th but there are certain basics that you should take from each look and each new perspective that you have learnt. Some people from what I've seen have never even bothered to take the time to look.