After the failure of the twin belt system in my optima mid, I have removed my components from the Mid and transferred them to the lazer. I will be doing extensive high load tests on the lazer printed pulleys by running the lazer on road with bald off road tyres and lowering the suspension. That was how i destroyed the short belt in my optima mid twin belt conversion. Will report back results next week. Also my 3D printed LA-31 has been improved by making it thicker.
https://www.shapeways.com/product/BTB5V5E25/la31-tower