Thank you for all the info on these rulers. They definitely will be put to the side for the meantime and I'm back to looking for that elusive 45 degree ruler that I need for a kaleidoscope pattern. I did discover that if I use the one TriRec and angle the ruler just a bit (maybe 1/4") in at the bottom, I have a "rough" 45" triangle and it works. It wasn't tremendously accurate but it worked for a trial run on this pattern. I'd like to have the actual ruler though. I did discover that the TriRec made a block with 7 wedges though! That works for a table piece anyhow.