Very nice. One thing I know to do for more studies is this: instead of going from photos, try some from direct observation. You'll be surprised by how much more you will know the object you will be drawing.
That's totally what I'd do if I had readily available access, but photo studies are my only viable option when it comes to stuff like expensive formal wear. Granted it won't teach you quite as much, but it has to be better than nothing :/
There are studio life drawing sessions on campus that I've really been wanting to get into; hopefully they'll have a slot for me when my workload clears up ^^