Patti, it looks really great - well done for getting the middle together, and at least now, you can see what is left to do.
Blinky, as far as I remember, the inbetween tris are the same size as the pieced ones, providing you stick to half inch sashings with that little quarter inch strip round the centre blocks. It is only me who had to do things different. Because I wanted my quilt to be a little larger, I used three quarter inch sashings in between blocks, and round the edge, so my in between tris had to be a bit bigger. I should have made them all a little bigger, but I had already made some of the pieced ones before I decided on wider sashings, plus I had the ruler.
So I just made the in between ones bigger to compensate. I think you can see how that worked on the last pics I posted here a few pages back. In reality, they should finish at a point but mine are about a quarter of an inch wide at that point.