The lower rail measures 7/8 x 1 1/2 inch and is designed to butt in the centre of the rail land. Draw a horizontal line to represent the upper section of the rail.
This is purely a guide, and by using the extended distance gauge, the position of all 4 lower rails will be identical in each case.
Using the 6 degree taper wedges, fit the upper tapered rail, align and lightly clamp assembly.
Cut the 6 degree angles on the lower rail and adjust until the upper section meets both pencil lines.
My first lower rail measures 7/8 x 1-1/2 x 8-7/32" long (mean).
Before cutting the top end of each leg, carry out the drilling procedures on each component. There are 16 joints on the 4 legs, therefore do not use the check marks for reference, instead, use numbers from 1 to 16. It is advantageous to place the 4 legs together before carefully installing the reference numbers and "x" marks. Failure to follow these guidelines could lead to serious error.
The rails are 7/8" thick, therefore in following the simple formula (half the thickness minus 3/8 inch) we require a 1/16 inch washer to centre on the rails. Reference from the top and drill 1, 2, 4 & 5 holes.
For the upper part of each leg, I require a 3/8 inch offset, so we use a 3/8 inch spacer between reference bracket and guide block. Again drill holes, 1, 2, 4 & 5.
Set up the extended distance gauge to correspond to the proper positioning of the lower rail, set up that position and all 4 rails will be positioned in an identical manner.
The following video describes the method for preparing and drilling the bores for the upper and lower joints using appropriate spacers and distance gauge.
Once the holes for the 16 joints have been drilled, use approximately 60% of the required dowels and dry fit the assembly.