I want to do 1/2 log cabins then set on point, Will I need to adjust yardage and number of squares. I noticed that a 8 inch square set on point is 11 1/4 inches , I have NO idea how to figure this out.

Sketch it out on 1/4" graft paper. You don't say how large the quilt is going to be. So without these important facts it is difficult to know. or advise.

I`m doing one from a free pattern
maryquilts.com
I havent got fabric for the set in but have been looking
Here`s the link to mine
http://www.quiltingboard.com/t-130682-1.htm
Gale

I just finished one of these (top). Very easy.

Deb, what size did you do. I want to make queen but don`t know how much setting fabric to buy.
Lets see a picture!
Gale

When you say half log what do you mean?
Original size 12"sq with new half log 6"sq?
or
half log 12"x6"?

If you look at the web site for the free pattern and my link it will show what a half log is.
Gale