Multiple tab placement...

[rokan51]

It seems that for multiple tabs the current placement scheme is something like (tab centre points):

x[i] = (i+1) * D
where D = L/(n+1) and L is board size, index i starting from 0.
This gives slightly wobbly corners as their distance from closest support (tab) is D where distance of any edge point between the tabs from closest support is smaller than D/2.

Proposed placing scheme like
x[i] = D/2 + i * D where D = L/n
would give more stiff panel for the same number of tabs (or that is similar stiffness can be achieved with lower number of tabs) as
the maximum distance limit of edge points from some support (tab) is lower.
Also internal points (between tabs) have support from opposite directions making it stiffer than for the corners - which come from perpendicular directions (which gives lower stiffness dz/F): finding optimal position of the is actually much more complicated mechanical problem but I believe proposed simple scheme change is already a significant improvement.
R.

Example for 2 tabs:

Current result:
XX________XX

Proposed result:
XX____________XX