High form 4 for me then. Basically, it starts with a double knife hand block left, then right correct? Well, we learned the forms the same way you are first, and thats what I have a black belt in, now we are being taught all the "hidden" moves. So far we are only on high form 3, pagey 6.
High form 2/ pagey 5, starts kinda similar to high form 4, but there is the upper cut and grab technique in there. It's one of my favorites. steps 1-3 or 3-5, is a sweet throw, lol.