
Step
1  The square
The construction starts with a square in which
an equilateral triangle is drawn. 

Step
2  The base line
The "Base line" is constructed which
dicides the length of the instrument, 6/8 of the original square
size (B) 

Step
3  The double base line layout
The whole figure is doubled by the mirror image
through the horizontal square axis. 

Step
4  The extended cords
The centre in the original square is the rotation point (C)
for the next step.
(D) is the extention line of the cords through
the intersections of the baseline and triangles. 

Step
5  The final (2D) layout after a determinate rotation
The complete plane layout occurs when rotations
are carried out on the main figures one clockwise and the other
counter clockwise.
The rotation stops on the point of intersection
(E) 

Step
6  The string lengths and measures appear
Connecting the midpoints of the side of the equilateral triangles
(F), belonging to the size of the baseline radius, points out
the position of the bridge on the longitudinal axis in the center.
The double string lengths occur (G) when this point and the
point of the extended cords intersect with the longitudinal
axis. Halve this lengths is the string lengths. At the same
time the division between neck and body H and I is decided.
H and I are in 2:3 relationship


Step
7  Location of corners and smallest width
The corners of the outline are positioned on the circular arc
(K) wHich is drawn from the centre of the original square through
the point of intersection (L) of baseline and cordline.
The smallest width appear between the circular arcs of the
rotated base lines (J)


Step
8  Fingerboard dimension
The size and proportion of the fingerboard relates as:
O:M=P:N
when 2xM=650 Than M=325.
If O=24 and the length of the fingerboard 269 mm
Then P=43.86


Step
9  Fhole size and location
The position of the Fholes are decided by the Lengths (R)
of the side of the equilateral triangle deciding the size of
the radius of the base line and its position after the rotation
completed rotation
The length (Q) is almost 72 mm


Step
10  Bass bar location
The irrational direction of the bassbar is defined by a line
(S) from the point of intersection of the cords on the longitudinal
axis and the tangent point on the upper Fhole edge
