hello questies
I have come to shill the only real alternative to base station-less FBT solution
The HaritoraX
https://store-us.shiftall.net/products/haritorax
https://en.shiftall.net/products/haritorax
here's a quick rundown
>functions without the need of lighthouses, powered by geomagnetic and acceleration sensors (9-axis IMU)
>can be mounted to the side of your legs so you can lay on your knees or cross-legged
>the software behind it has been in development for quite a while, and has seen many improvements that makes it far surpass similar solution such as slimeVR in accuracy and especially in ease of use
>expansion ports to add in future sensors that can do some nifty things and add in more sensors 
and most important of all
>not a chink scam or a hobby project, the company behind this is owned and operated by Panasonic
for all you quest and inside-out tracking headset users, this is your only alternative to FBT without having to spend a MINIMUM of 600$ to achieve it (3x vive 3.0s and 1 2.0 lighthouse), without using some hacky hardware/software to achieve even a quarter of ideal tracking