Seems like you can build all sorts of things with an Explorer case.  I was recently commissioned by a Bro. on a different forum to do some tweaks for a 6350 build he was starting.  This is one of the more interesting case sets I've built.   It starts with the basic mid case that you guys refer to as a "V2" with a T21 crystal for a more domed look.  The case-back is then reshaped to simulate a bubble-back with the inside engraved in the "old" style.  A vastly different bezel tops it off