I understand that he is looking for a ready made unit, which is why I listed the Lasermax unit. I have dealt with Dawg180 in the past and am trying to throw him a bone. I was in the same boat as well when I first started looking for IR lasers. I took it from his post that, while not looking for a home brewed, he wasn't overlooking it. Having owned a PEQ-4, DBAL I2, LPL-30 pointer, GCP-2A, LAM-1000 and the DIY Beamshot, the Beamshot is the sleeper of the group. For the money, it performs well and has been more reliable than my DBAL I2 with the known battery drain problem. I even had one of the new .7mw version (July manufacture date). So buying a Laser Devices doesn't mean no problems. I also don't really want to mess with electronics. When you think DIY, you think having to detach wires and re-solder them on. But it isn't the case with this. You carefully unscrew the head (which does have thread locker), pluck the red laser diode (carefully so you can reuse it if you want) and put the new one in (with three hands).
In fact, for $400. You can have an IR laser, visible red laser and a Surefire 952V light (w/ both IR & visible light). So for less than the cost of a Otal class I laser, you can be pretty well set up. All for the 'cost' of about an one hour research on the DIY and one hour labor. While not as trick as a LAM-1000, still an extremely flexible system.