I got the idea from Gazmosis on the FISD forums, aka whitearmor.net
http://www.whitearmo...heavy/?p=363493
His post about building an ATA helmet is really good and would apply to a TK, TD, or TX.
Two of the pics I linked above, the pics with the white plastic showing, are from his FISD forum post. You will see 2 screws and posts per lens in his pics. The other pic I posted above shows 4 screws and posts per lens. That is my setup.