On 14 Mar 2005 05:20:14 -0800, "Bugs" vaguely
proposed a theory
.......and in reply I say!:

remove ns from my header address to reply via email

Yes, the bubble/s are probably not adjustable. Someone bought me one of
the 'cheapies' and it's pretty primitive but the laser can be seen over
a hundred feet.

Well it has to different from what I have seen, if you can see the
beam on a target at 100', on a bright day.