I've been gathering parts for human-scale steampunk guns myself, for abouta year now! I haven't found quite the right base weapons, yet, so the parts are sitting in my closet, unloved.

I was also disappointed with the Grodbort's line. Some of the details were nice, but overall they really seemed more like Flash Gordon-styled retro rayguns than steampunk guns. A little bit too futuristic, a little lacking in the Victorian department.