Several Questions About These Position Callouts

[[Da...]]

I have several questions about the position callouts in the attached print. I have no idea how to tell the CMM what I need here. 

 

1) The position callout on the .563 hole (item 3) does not have a datum.

I assume it must be referring to the 1.009 and 2.880 locations from the sides, correct? So I should use those two edges as my datums when I set it up?

 

2) The composite tolerance on the bottom (items 10 and 11) only lists datum A, which is the hole from question 1.

I don't have the CAD model, but I assume if I get it, it will pull in the correct nominals. Wouldn't it need to consider all 3 directions (X, Y, and Z)? I have never done position with more than 2 directions. Is that even possible?

Would I have to do the holes as cylinders? Or would I scan the holes and project them to the faces?

If projecting to the faces, would I use the inner or outer faces since the material thickness could vary?

For the top line, I believe I would have a separate position characteristic for each hole within .030(M), as that is how I would do a regular position. 

For the bottom line, my understanding is that would control the position of each of the 4 holes to each other.

I am confused because I thought the bottom line was supposed to have less datums, but both lines only have datum A. 

If the bottom line is controlling the holes to each other, what does datum A have to do with it?

How do I make the characteristic(s) for the bottom line? Is there a singular characteristic that takes care of the whole pattern or would that need to be separate for each hole as well? 

 

[[Ma...]]

I must admit - this is a confusing one.
I think this is wrong.

TP of datum A is not giving me much sense.
Then TP of 4xø.405 is not giving me much sense in a way how both rows are same, just with different tolerance.

Also datum A is small to have it as proper cylinder and control their location.

For TP of 4xø.405 - .030 tolerance would be pattern and .015 would be individual ones, but i have no experience in composite TP.

I would be glad if main datum would be plane (3.946) and then circle as datum B ( previously datum A )