Has anyone tried the Slingshot ghost whisperer kite foil for wingfoiling? (I'm thinking as a race foil)

Not that I'm aware of. What wing would you use? They are fairly rare here in Aus. The fuse is the same as the Moses fuses of that era so there are Moses wings you could use.
There were no big wings made for the GW in the Slingshot Moses collaboration so back in 2018-19.
Grant