If however, you wish to feed two 5 frame nucleii using
the rectangular plastic feeders made by Nicot there
is a method of using a pair of plain plywood covers 9 mm thick with
offset holes that will allow two such feeders side by side within
a "National" Eke or a "Rational" Eke.
The diagrams at top right give the dimensions for hole cutting.
The front elevation shows the positions of the two feeders
whilst the plan view shows the feeders themselves (with the roof
9 mm plywood is specified owing to it's greater rigidity
and freedom from warping.
I have used this method many times and it is
particularly useful if you have formed nucleii that are a little
under strength or you require them to draw out foundation.