all mounts / internal constrct will be.... MECHANO :P easy to bend and quite sturdy once made
i will epoxy lego cogs to the focus rings and 1 on a pivot in the middle for focus this is only a IDEA i most likley will just make 3 normal 160-200mw handhelds
I don't have any need for a three laser mod, but the idea to use LEGO/Technic cogs as extended focusing rings for the Aixiz module is inspired.
It would even open up possibilities for repeatable servo-driven focusing. Taking it even further, if you could kit-bash the output of one of those ultrasonic rangefinders like this http://www.hobbyengineering.com/H2951.html into a LEGO Mindstorms control unit, or your own PLC and servos, you'd have a pushbutton auto-focusing laser.
Only problem I see is that the sonar type measurments will probably not get a good bounce off of balloons or matches, but the biggest object in the background.