@butchrichard,
have not succeeded connecting my FST via Startech TB3 to TB2 adapter and TB to firewire adapter as suggested.
Result: FST won't sync (LED flashes Red/Blue).
Please advise.
My setup:
NUC7i7BNH | Windows 10 Home
FireStudio Tube
Startech TB3 to TB2 adapter #TBT3TTBTADAP
Apple TB to firewire adapter #md464zm/a