Also my TT bike in race trim. I've got the extensions set at their widest (90mm from center of bar) and the arm pads are also at their widest. It works for me. I've tried narrow, I've tried the Landis, none of it feels that great.
The seat is some OEM saddle we took off of a new BMX bike, it's cheap, wide at the front, well padded, and is short enough to bring me back to 5 cm behind the BB center, but not too short so that it's UCI illegal.