I built this
FSIR Spin 5 in 2018 from a new full bike purchased in Bangkok for $600, and it's been great, trouble-free ever since. It's been on a handful of tours, including three overseas tours in South Korea, Malaysia and Thailand. Zero problems throughout. All in all, a fantastic, light, affordable, value bike with an unique spin pivot folding mechanism.
Weight-wise, it comes in at under 9.5kg, taking into account the additional weight of the installed Topeak Java bottle cage (120g), PowerGrips straps and the Tern Luggage Truss (195g).