I just line up a scrap piece with the edge take a pen and draw a line then with a xacto follow that line then cut 90 following the front plastic cover of the foam once I have the rabbit joint done I go back and scrape any leftover foam off the front plastic cover. it's all done by hand no straight edge. then using hot glue gun on low setting I glue the 2 edges and push them tight .
and thank you for the compliment these are the first ones I have done I still have a lot of detail work to do on them but it has been fun building. I still have one more printed out to build. then I want to build the station . attached is a photo of the station .
Thank you for the reply. You, sir, have steady hands! Also, the station that you posted looks great. Do you have a complete set of working drawings of it that you would be willing to share?