Been away for awhile, computer problems sorry. Just about one thing that was mentioned earlier about TSD being around before TKD. The founders actually trained together. Hwang Kee, Lee Won Kuk, & Ro Byung Jik, Kim Ki Whang were all friends. Ro incorporated his system (Song Moo Kwan) a year earlier than Hwang incorporated his system. The term TSD was used earlier, but by Lee, not Hwang. So this creates a dilemma. The words TKD were not used until the 60's. But, I'm talking about words only. The techniques & ideas all came along together. But since SMK TKD came first I personally don't think we can say TSD was the forerunner. Oh yeah. I've studied TSD for 30 years & TKD for only about 4 off & on.