I've used several different DP rulers/templates. I also have the complete DP system from
https://www.sewinspired.com/2010/10/winding-curves/ I won those at a local quilt show for 1st place decades ago. They are excellent but pricey.
I have the DP die for the Go that finishes at 7 inch, odd size. I have the block lock set I picked up on the guild free table but never used them. My favorite are the templates from Missouri Star. In two sizes. One for a ten inch square and one for five inch square. Not pricey and both have gentle curves. In fact the large size was a daily special a couple weeks ago for about $6.