I'm 68yo and train in WTF Kukkiwon style and have my red belt with black next. (Probably next year.... I hope.) I'd like to learn ITF style as well which I did for a while back in the '70s. Due to my age I'd like to start ITF now and do both styles at the same time before I get too much older and frail. The idea is to get my black Belt in both styles. (Before I run out of time.) Does anybody do this or is it not a good idea. They seem to do the same kicks blocks and strikes, just different patterns.