|The marker line is ready for routing.|
Second, draw a pencil line to match the heater wire location. Don’t stretch the heater wire. Mark the wire as it naturally sits on the floor. The subfloor is 28mm plywood.
|1/8th inch straight bit|
|Follow the marker line. It doesn't have to be perfect.|
|On the right- marker line is ready for routing. On the left- routed line is ready for heater wire.|