Hyken Mesh Flexfit Headrest Riser

During the pandemic, I upgraded my home office sitting situation from a folding chair to a [Hyken Mesh Flexfit](https://www.staples.com/Staples-Hyken-Technical-Mesh-Task-Chair-Black/product_990119) office chair. The chair itself was well reviewed for tall people and overall it has been good (get the roller-blade wheel upgrades) but the headrest was uncomfortable as it cut into my shoulders and was far too low. I designed this riser to bolt on in between the chair and the headrest. You will also need M6 heat-set inserts and some new M6 bolts.

To print, use the default orientation mostly flat to the bed with the bolt holes going straight up) with supports, at least 4 top and bottom layers and walls, and 30% or more Gyroid infill. After printing, removing supports and a quick sanding to clean up the faces, install the heat set inserts and while they are still a bit warm, run bolts through the headrest and into the inserts and tighten only partially. After a few minutes when the plastic