I just talked with Andrew Lamp from field ready how I can help and he told me if I can help him with a height-measuring board that should be later produced with a CNC and also the measuring marks should be made with a Lasercutter.
Also sprung instead of a ball bearing component a little lever to act as a brake on the up-down platform that goes on to the child’s head.
If you want to help I can provide you with the Rhino files. I will load the files into Fusion360 and invite you as a colaborator. We will make a little model with the lasercutter and then make it with our maslow.