There is a pic of my DF installation in this thread:
http://www.rcuniverse.com/showthread...99&forumid=162
Really wasn't that much trouble...but I added some beams under the ply engine mount plate that went back and intersected the bottom of the plane a few inches back, then connected the beams with some 1/6" ply...made it nice and strong and gave back some of the strength I lost by removing most of the firewall..