Ikea Markus extension mod

An extension mod for Ikea Markus office chair will increase the width of your chair for a more comfortable sitting.

You will need longer screws. I used M8x100 for this specific model, but any length will do, you can quickly increase the length of the model in the slicer. 

I printed the part with PETG and it works without issues for more than a year. Recommended orientation is in the photos. Supports are recommended, but might not be necessary.