tkhooper--here's an EQ rendition of 12 12" blocks with 3 1/2" sashings on top and bottom. Over all size is 36 x 65. The size of the sashes cut would be 12 1/2" x 4". You could make the top and bottom sashings a 1/2" wider (cut 4 1/2") to get the 66" you want[ATTACH=CONFIG]513862[/ATTACH]
Thanks for the kind remarks...