We Printed a Mobility Trainer for Ella — and It Changed Everything

Meeting Ella (And Getting the Important Details Right)

Before we printed a single production part, we sat down with Ella and her family. The agenda covered the critical stuff — fit, sizing, requirements. But the most important question of the meeting? What colors do you want?

Meeting Ella made everything real. This wasn't a technical project anymore. It was a gift. Members who had donated materials doubled down. The printer fleet got assigned its mission. Material orders went in, and as spools started arriving and parts started coming off the beds, the energy in the shop was different.

The combination of PETG for structure and TPU for the flexible, impact-absorbing parts meant we were running printers on two different material profiles simultaneously. Roughly 14 spools total and around 200 hours of print time across the fleet. Parts bins filled up. The build was on. Link to the 3D Files

The Assembly Party

Once the parts were close to complete, we did something that felt exactly right: we invited Ella, her family, and their friends to come to the makerspace and build it together.

They made it a potluck. People brought food. Lots of food. We're talking a spread that would make any Sunday football fan reconsider their life choices. There were snacks, there were dishes, there were people who clearly take their potlucks seriously — and there was a mobility trainer to assemble.

The build took a few hours. The laughter and conversation took all day. What came out of it was beautiful: a fully assembled, fully custom, fully Ella's 3D printed mobility trainer — and a room full of people with very full bellies who felt part of something genuinely good.

Where Things Stand (And Why Reprinting Is a Feature)

As of writing, we are about two weeks from Ella and her family walking out of GRM with her finished trainer. The update from the family: things are going smooth.

Here's the part that keeps coming back to us: if something breaks, we just print a new part. No waiting on manufacturers. No specialty parts. No supply chain. A broken component is a thirty-minute conversation with a slicer and a queue jump on the printer. That's the promise of open-source, community-built assistive technology — and it's not theoretical anymore. We saw it happen.

Huge thanks to the Make Good nonprofit for releasing these files to the world, to the GRM members who stepped up and donated materials, and most of all to Ella's family for trusting us with something this important. We can't wait for pickup day.

GRM Builds Make Good's Mobility Trainer for Ella