Next step in the 175B, insurance companies are a pain! CS prop question

Well, sent my info to the insurance, they got back to me, through one of
the other partners, and said they needed more information. They wanted to
know how many hours I had in a 175B, I said I had none, but shouldn't the
172 count? It's the same except for the CS prop. So I gave them what they
wanted, and they said that I was covered now for dual until I got 2 hours
and a sign off. Went and did that tonight, now I'll fax them a copy of the
signoff and away I go! I hope. I won't be suprised if they want something
else though.

Love the plane though, man what a difference from a 150. 15 years older
than what I was flying and so much nicer. I only wish it had a back window
so I could hold centerline better.

Still a little weired out about the CS prop though. Read what I could
find and it seems like everyone I talk to has a different opinion on what is
right and wrong. Some say climb at 24MP and 2400 RPM prop. Cruise at 23
squared. The tach has a red area marked and is noted that you shouldn't run
in that range for an extended period, it's around 1700-2000 RPM's I think.
What's up with that? Vibration? Harmonics? I was also told to use full prop
if under 100MPH or under 15MP. Can anyone enlighten me on this?

Wayne