Hi David, don't you hate those curves in your strips? One of my favorite things is my June Taylor Shape Cut. To cut selvage to selvage I had to fold the fabric then fold it one more time. It seemed I would get the little L curve at each fold and nothing I did seemed to make any difference.
I now have a lip edge ruler and a Gypsy Gripper. The Gripper's equivalent can be found in a hardware store and Bed,Bath & Beyond. The lip edge on the ruler keeps me from sliding and the gripper keeps my hand away from the rotary cutter and lets me keep presser on the ruler through the complete cut. I haven't had an L curve since I began using them. You have had lots of good suggestions to try. Good luck.
http://www.overstock.com/search?keyw...rchType=Header
http://www.overstock.com/search?keyw...rchType=Header
lip edge ruler
[ATTACH=CONFIG]124499[/ATTACH]