I racked my brains on this one fro a while trying to figure out how to get the chip and display in there to look and function good. I did not want to sacrifice the box dimensions in any way and in the end I stole a bit of my aluminum mod design and it proved to work great. I think one of the coolest things is that the chip can be removed if need be so the actual electronics are basically a separate unit.
The removable electronics is what sold me...nice. There goes my vaping budget for this month