Are all Wapi's 11/16 with a 1/4 ground or are there two different Wapi's. I seem to remember someone talking about Wapi I and Wapi II and there being a difference. I can't seem to find the post so if anyone could let me know where it is or if you could let me know if there are different Wapi's, what the difference is and how to spot the difference. Are there any indication in terms of the stamp on the tang? Thank you!