🔍 You need to firmly fix the workpiece so it won’t shift under the router’s force. The SpeTool sled kits include **clamping dogs** or brackets that you can screw down around the slab to hold it in place:contentReference[oaicite:39]{index=39}. These slab clamping dogs act like adjustable stops that prevent the wood from sliding in any direction. If your base is a piece of plywood or MDF, you can screw or clamp the slab directly to that as well. Some people use wedges or shims under high corners to stabilize a twisted slab (so it doesn’t rock). The key is that the slab must be stationary and stable: use the provided clamps/dogs at multiple points along the edges. If you don’t have those, even improvised wooden blocks screwed around the piece can work. But the sled kits are designed with this in mind, so they give you the accessories needed to lock the slab down. Always double-check the slab is secure before you start routing – you don’t want it creeping on you mid-cut!

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