I have an original wanhao duplicator i3. I wanted to install a BLTouch, so I needed one more pin, and I was tired of the melzi not having enough flash for the modern versions of Marlin, so I upgraded.
I tried the FYSETC F6, and honestly, it's a PITA. I would definitely recommend using an Einsy Retro instead, but this works, and it works with the trinamic TMC2130s (with some modifications).
The CS pin on the X port and the Z port are both wrong. There's no way to sign up for their forums. Marlin has better pinouts, but it's like they didn't even test this at all.
TMC2130s: great. F6 board: Buggy, and unsupported.
But anyway, this mounts to two of the melzi holes, with the original screws, and lets you mount a new controller to those mounting holes. It's partially blue because I ran out of red mid print.
(Sorry for the absurdly large brim pieces on the corners...)