I got bored (and started to run out of) the interesting back banner bits for the Flash Gitz so I had to start improvising. I used a shield from the Feral Orks and a glyph and gunshield for make shift back banners.
Other conversions include a scope for a Gitfinda and a terminator shoulder guard. I also experimented with konverting the gunz in decidely non-Chapter Approved ways. In addition to the power plant bits, I added extra muzzle bits to the opposite side of the gun for a exhaust port of sorts. I repositioned some bits to align in odd angles so that nothing on the gun was square.