I mounted my jig to a piece of plywood about 16" x 20" and then I clamp the whole thing down to the workbench when I use it.
I'll take a couple pictures tonight and post them here tomorrow.
I just saw this post on my Facebook page. So sorry I am late. I have my K3 mounted to a piece of laminate that I just clamp to my bench. I have some T-track that I bought to put into the laminate for stops and also a clamping system.
Seeing this post reminded me of this fact and I took everything out to work on it but decided it is too late right now so perhaps tomorrow evening. I will post some pics of the finished product here.