I'm playing with a really cool online lighting diagram creator today, you can find it here:
I used it to create a diagram of my current setup, which is:
Typically, I have to do a lot of floor cleanup in Photoshop, and with the model pretty far from the background, I need to stay above 50 mm or so to keep the equipment out of the shots. I want more space to work in!
Failing that, I do have a few ideas to try out, more on these later.
Here's a shot using the current setup: