Yes. It took me 1.5 hours to make a single cut on two pieces of Aluminum. The F-718 Longerons are crucial pieces of the structure. More importantly making one small mistake on them will require an expensive shipping bill to acquire more of them. As a result I bought four of them, though only two are needed. I marked the points laid out on DWG #18, then double checked my measurement about four or five times using a few different methods. After I was sure of my marks I trimmed the longerons to length. I went about 1/8" longer as a just in case measurement.
