Hi, this is working now for the diameter, thanks and much appreciate it.
What do you use these for? Have you thought about using a circle block ( as mentioned above ) then changing the scale to get the correct size? Then you wouldn't have a bunch of blocks with different names that look the same but only have a different radius.
What I often do is create blocks from scratch. As a base point, I draw a circle and place it in a layer that is not printed (in this case Fulcrum). Then make it into a block manually.
The timestamp is to differentiate blocks, so each block will in the end be different.
It's the way that I'm used to working, it may not be the right way but it makes it easier for me.