I designed a new full sized upright for the Modular racking system to allow Ikea Skadis accessories to be added to the sides of the rack

I decided not to alternate the holes and to include all of them for maximum flexibility on such a small space. The panels are designed such that stacking panels will keep a consistent spacing so that accessories can be used between them

I have included two different models. 
The first model attached to the existing uprights to allow for a skadis panel.
The second is a new upright with the skadis paneling built in. It is a little more compact and looks tidier.