Oh yes, a proper duplexer helps a lot - the folks at http://www.richardsonrfpd.com/Pages/Product-Details.aspx?productId=1152678 were kind enough to sell a small quantity (2) of their USD007A LTE Band7 ceramic duplexers for $38.60 each (incl 3% cc charge) + $21 FedEx ground from Reno NV. Using silver solder as recommended wired it up dead bug and gets much better signal around the room, nowhere near as picky in placement.
