You will develop your own technique the more you use them. I am a top down feeder so I install the top first, opening the clamp holder wider than one does for straight blades. Then ensuring it is placed properly between the clamps I tighten very tight. Threading it through the holes and opening the bottom clamp wider than straight blades I do the same thing. If the blade is not sitting in the clamp correctly it will slip. For me there was lots of trial and errorr to develop the muscle memory to find the right spot especially on the bottom clamp. It is o.K to have a look under the table to see how every thing are lining up.