a tool like this would never interest me.
1. a different template for each size HST? no thank you
2. drawing lines? no thank you
3. all those extra steps? no thank you
4. ridiculously expensive? no thank you
different tools work best for different quilters.
for me, the EZ Quilting line of triangle rulers - most designed by Sharon Hultgren - are much less expensive, easier to use, fewer steps, and provide consistently accurate patches. each ruler can be used to make a variety of sizes in just a few simple steps.