I love using spiral blades, once I got the hang of them. I haven't ever had a problem clamping them because I take a regular pair of pliers and a pair of needle nose pliers and untwist about 3/4" or so on each end. I have to use my magnifier to see what I'm doing, but it's pretty easy after you do it a few times. I use FD 2/0 and FD #1 Flat end blades and I hardly ever break one. I have a Dewalt and I run the speed on 4 to 5 and just take it easy and let the blade do the work. Hope this helps.
Kim