Few more technical questions on my new 2005 Bayliner 175 Capri 3.0/A-1

1)
The trim gauge on the dash doesn't read quite right when trim all the way
down.
When lower unit is extended all the way down, the gauge show about an 1/8
inch higher than the mark for full down. Likewise, at full up, the gage is
off the
scale past the full up mark by about 1/8 inch. I read the adjustment
procedure,
but the sensor is at its full travel in the screw slots, and can't go no
more. I
wonder what it would take to calibrate the trim gage so that its right on. I
wonder if I can pad the gauge with a resistor to properly calibrate it. (I'm
very
well versed in electronics) Or is it no real big deal for the gage to be
off ?

2) max trim limit: This boat has a 3-way rocker for trim (and trailer), and
that's all fine. But after reading the manual, it says that when max up
trim
limit is reached (and it cuts out), that the cylinders should be set to 20
3/4".
On mine, its exactly 20 1/4". Could this be more of a "boat-specific"
setting rather than a standard Alpha-1 setting? Again, no real issues with
trim, and I don't really need it to go any higher that what's its set for,
just
wondering about this.

3) Dash lights: look real nice with them bright green backlit gauges and
all, but they leave this horable reflection in the windshield such that you
can not see out the windshield when driving out at night in the pitch black.
Is there a way to dim them, tone them down, or shut them off ?

Thanks!