"BobR" wrote in message
ps.com...
The triple redundancy of posting was a computer glitch and the stupid
thing didn't indicate that it ever posted.

As for recalibration, I found that it wasn't always necessary but on a
couple of occasions, it was giving me readings that my eyes didn't
accept and it proved to need recalibration. Since I wasn't using it on
a frequent basis, I found it easier to simply recalibrate before use.
Doesn't take but a few seconds to make sure.


Something might be wrong with yours. I have had mine since 2002 and have
needed to calibrate it exactly twice. I do check it from time to time on a
know level and a known 45 deg. angle.