I believe Carter (pseudonomen137) said that he would check the output of anyone's laser for free, if you pay shipping both ways. IIRC he also said for $20 you can get an output graph.
Medussa - since you are so close to Iowa - maybe you should PM Hemlock Mike to see if he is available for testing ? I wish I lived closer to the old fart hehehehehe ! I dunno if Clear Lake, Iowa is close enough for a drive for you or not, but if it is - you would be surprised how fun it is to get together with some other forum members...