Wow, that's looking sweet! Love the stand. Very classy
Your pics are pretty good too. You could use a bit more exposure on them maybe. You can either bump up the exposure during post processing with an image editor, or, if you're finding that your pics straight out of the camera are under exposed based on the exposure metering that your camera is giving you (aperature and shutter and ISO), then try turning up the
exposure compensation.
Photographing tanks is challenging for SLRs because the lighting, the glass, the water, and the subject can all mess with the camera's built in light/exposure meter. A lot of the time you have to adjust whatever the camera gives you, or redirect (exposure wise) what the camera thinks is a 'good image'.
I would also recommend getting at tripod. The 100mm macro lens is a great lens, but when shooting at 100m every little movement from your camera (hand shake) will register in the image (as blurry). If you have the IS version of the 100mm macro that will help, but I would still put it on a tripod. Tripods are cheap and will produce A LOT more usable images.
Finally, HOLY FRAK I want to see more Gundams ! Maybe sneak in a few close ups of those beauties
