I made one. It's sweet. It's a 6*3*.75in block of aluminum bored out to fit 10 DX6090 modules and 10 8˚ optics. It's at least 1500 lm otf and draws 48W on high (but at 6V, I don't have a suitable bench 12V ps), including all converter losses. I suppose I could switch the emitters to 1000mA buckpucks someday, but part of this project is that it's built totally with off-the-shelf parts.
The three modes are 4 modules, six modules, and high is all 10.