The shock cord at the back edge hooks around a plastic hook bolted the the door.
The same idea at the front but I will be changing it slightly so its easier to reach. This was the second attempt so the final result will be neater.
The additional advantage of being able to prop the front edge open for ventilation or for use as an air brake for long descents. You would most likely had to have it open more for much braking effect. It just a rocket going down hill.
I went for a ride this evening checking out the local time trial course. I did ride a time trial on it yesterday so had another go at a slightly slower pace to figure out where to optimize my effort. On yesterday's ride I got it slightly wrong in not attacking a slight grade enough and lost some speed. Even though I had ridden this section quite a few times I didn't realize how much it could hold you up if you had your effort wrong. I guess this is the difference between racing and just riding. The slower ride was about 30 seconds longer than the actual time trial. During the time trial I had a few folks in front of me to catch so the rabbit effect was in full force. I did the course in 9:47 with an average speed of 44.27 kph. The course is a bit hilly and not much in the way of rolling hills that favor a velo. Right now I have a rather low high gear in the SL mostly so I also have a very low gear for climbing the hills here. A bit higher gearing would have helped some but the engine needs to be more fit to make a real difference. It wasn't too big of a surprise to set a new course record considering the aerodynamic advantage of the SL.
I am getting using to the tiller setup in the SL. I was a bit shocked to see a max speed over 83 kph as I braked some to keep my speed down. I will continue to ride the SL and then switch back to the GT once I have changed out the rear fender. The new three layer fender with carbon and Bio-Mid is much less noisy than the glass and Kevlar one. They both ended up weighing about the same but the carbon/Bio-Mid one is much nicer and will even go into the glass versions of the Milan. One does get spoiled easily.
An Xseam of 45" or more means you will not fit in the SL. With very short cranks and an extended BB position it may be possible to fit slightly taller but I would recommend a trial fit.