Update v11 BSB bracket: Made a adjustable bracket for attaching the interface to the Beyond. This adds extra flexibility for getting the eye distance just right. Although it is best to get the proper eye relief by modifying the padding as using this will introduce more light leakage. This requires 2 additional 12mm M3 bolts and nuts. This should work with the v10 and v9 interface but has not been tested yet as my printer is still out of order.

Update v10 interface: Slightly adjusted the shape of the interface for a better fit on larger faces, removed some unused bits left from previous versions, sculpted in the inner area to block light better. Untested as I am having issues with my printer at the moment.

This is an experimental interface for the Bigscreen Beyond that I made for a friend (RAGSAQ he streams on twitch https://www.twitch.tv/ragesaq) who had just gotten a Beyond and was having a lot of comfort issues with the default facial interface and soft strap. As I do not actually have a BSB yet or even a index for that matter this has not really been tested yet, but the model is based off of official cad files from Bigscreen and Value so it should be pretty close. To perform some sort of test I printed a model of the BSB from the official cad files and rigged it up to a old quest strap and it seems to fit and function well as far as I can tell from that.

I closely modeled the shape of this interface after the index interface, but slightly adjusted to accommodate larger heads better. It should be possible to remove the padding from a Index interface and glue it onto this. The BSB securely bolts onto the interface using a bracket over the BSB strap attachment points. There is an adapter that mounts to the index strap then slots into a socket on the Interface so that the headset can rotate up. The friction on the rotation should be adjustable through the tightness of the bolts on the bracket securing the adapter in place.

In order for the index strap audio to actually work with the BSB you will need a USB DAC with sufficient power for the index speakers and you will have to wire a cable that is compatible with whatever dac that you use to some pogo pins glued into the index strap adapter, sctanf recommends pogo pins that are 9.5mm unloaded and 7.5mm loaded, with a 2.54mm pitch. These pins are what send audio to the index speakers on the strap.

I also have another related project for some upgraded speakers for the index strap, this is really where upgraded speakers can be fully utilized with an external dac, as the one built into the index is not capable of driving them to their full potential. https://www.thingiverse.com/thing:6390315

The index adapter is based on the design by sctanf here is the original:
https://github.com/sctanf/Bigscreen-Beyond-Valve-Index-Strap-Adapter

For the small parts I highly recommend printing them out of something better then basic PLA, like PLA+ or ABS. Basic PLA seemed to work fine for my test prints, but I would not expect them to hold up well to daily use. I would recommend 100% infill, and normal support only touching the buildplate.

For the interface itself I would recommend PLA+ but basic might be OK. I would recommend using tree support with 60 degree support overhang angle only touching buildplate. If you use support everywhere it will make 2 of the bolt nut slots really hard to clean out and if your printer is decent at bridging it is unnecessary. Printing at 30% infill with 1mm wall/top/bottom thickness seems strong enough in my test prints even with basic PLA, I do not think that more would be really necessarily especially with PLA+.

For my test prints I printed everything at a layer height of 0.2mm and it turned out pretty decent. Of course less will be better, but it will take a very long time for the interface.

This is designed to use M3 bolts and nuts 4 - 20mm long and 2 - 16mm long. Also make sure to use bolts with flat heads or use washers. I was trying to use some bolts with sloped conical heads and they are likely to cause splits in the plastic unless you use washers with them.

I included the .blend file in case anyone wants to make modifications.

If you would like to get updates on my projects consider following my DevRandVar account on X. I made it for random projects like this: https://twitter.com/devrandvar