I like the side cover design. It's funny how sometimes little things on a bike can take a lot of time and work to make.
Here's a suggestion for future similar projects. Check out kydex or other thermoformable plastics. They come in different colors, sheens, designs. If that sweet bike were mine I'd see if I could find ways to use them to make covers, housings, etc. Durable, light weight, easy to use, shape, reshape, drill, no rusting. The use is endless. Now, your bike has an old school appeal to me and so you might want to keep everything metal for that purpose. But I guess I'm trying to open a window of imagination and possibilities that are clear in my mind but kind of hard to convey in this early morning hour. Here are some unrelated to motorcycle pics of stuff people made that might help see how DIY thermoformable plastics could possibly be used in bike mods.
http://www.parallaxtactical.com/store/bmz_cache/c/c1930c1d1354b8cf8e616088840...http://gr8holster.com/assets/images/autogen/a_Kydex_molding.jpghttp://www.teamcrc.com/store/images/products/1357.jpghttp://i.ebayimg.com/t/TOPS-Fire-Starter-Piggy-Back-3-Rods-Magnesium-Ferrociu...Here's a vid of a guy who made a simple DIY vacuum forming setup using stuff from a hardware store and a shop vac. I'd love to figure out how to do this with headlight housings, speedo housings, etc.
http://www.youtube.com/watch?v=50-sR54UBgY Maybe there's a way you can make a seat pan shaped like you want then cover. Or maybe the back section could be a faux raised area but still be coveed to look like the one in the previous post with the red stripe. Or maybe a similar profile but the rear is a storage area.