I think NavyDoc is asking about the included jig in the GasPatch kit of the Salmson.
It is made from laser cut cardboard and a printed paper sheet for placement for the jig parts.
NavyDoc, I have not yet build the kit, but I have it in my stash. The usage of the rig is mentioned in the manual and for wing mounting.
I would not use it for the painting of the model, or be careful at least, because due to the laser cut the edges are sharp and can scratch the paint.
Cheers,
Frank