I had an Acuwrong until a few days ago. It consistently read about 10 degrees (F) too high. I replaced it with an Ambient Weather WS-2902B in the same location and I'm getting much better results.
I'm admittedly biased but this seems like a good fit for a Cessna 177. Very comfortable/roomy in the back seat. Two big doors. RG is a little faster and has an injected engine, B model is a bit cheaper.
1. They are charging for labor (approx. 1 hour?)
2. I don't remember this being mentioned, but I could be wrong.
3. They said they are working on it, but that the altitude bug (for example) does not come out of the same data bus as everything else so they are looking for ways to work around that.
There was a big kerfuffle about gas generator rotors on the T700 engines made by GE that affected Black Hawk and Apaches from around 1985 to 1988? I'm not familiar with any serious design flaw that caused a series of Apache accidents.
With deployments these days they are finally getting a ton of hours, but yeah back in my day (I got out in '95) it was normal to take 20 years to get to 2000 hours if you were in Apaches. I was a 67R, for reference.
It's celebrated in Mexico, but pretty much only in the local region around where the battle took place that the date commemorates. I forgot the name of the town. EDIT: It's Puebla, had to look it up.