As John Tap in describing this traverse board remarked, anyone who could set off an accurate right angle and had a scale-ruler could use a sheet of blank paper and dispense with the board.
Njengoko uJohn Tap echaza esi sinqamlezi wonke ubani waqalisa eyona engile ilungileyo abe nomphathi wesikali enokusebenzisa iphepha elingabhalwanga aliphithikeze nebhodi