When the crinoline bow had dried, I cut it to length, formed the tenons on its extremities, rounded it and bored the holes to accept the two stub stretchers. The stub stretchers were turned using the off-cuts from the crinoline bow.
The leg holes were bored into the seat which I then roughed out with a carving disc mounted on an angry grinder and then followed up with a travisher.
After sawing kerfs in the ends of the through tenons, I glued the undercarriage into the seat. Oak wedges were then hammered into the ends of the tenons, locking them into their mortises.