I am the one that has the 40.5"/15 db gain omni from lan parts. I am getting the 15db gain Comet to see if it is better or worse. BTW, Comet makes a 39" omni that claims to be 10db so I really think my
40.5 inch is about 10db just as you said. The 40.5 works well for me and I am hoping the 70" Comet will be even better.