"Channel locks are a good way to grab onto clamp handles and greatly increase clamping strength quickly and easily.  I've also found that Festool Rotex tools mess with my hands and wrists like no other. Especially when you need to hold the workpiece in one hand and sand with the other.  Here is a jig I've come up with that comes in very handy:https://www.youtube.com/watch?v=OVk4PB18Jak"