The sliding deadman was a relatively fast component to produce. The tenon is 1/8 shorter than the under-benchtop groove is deep. The notch that rides on the front stretcher was marked out with a bevel gauge. I bored a hole down the middle with a brace and than chiseled out the remainder of the waste.
Three of the 3/4 inch holes are lined up with the holdfast holes in the legs. They, along with the remaining holes, are placed along two rows, each with 1 inch spacing on centres. The two rows of holes are offset so that there is one hole every 1/2 inch down the front.
The sliding deadman slots into the deeper hole I made under the benchtop so it clears the stretcher, and then slots into its groove so that the front remains flush to the benchtop.