To make you an offer PDF drawing is ok.
We use Edgecam for part design and toolpaths.
If you want a complex shape we prefere DXF. or DWG. files.
Wire EDM, we use 0.25mm wire, inside corner radius would be approximate 0.16mm.
The gap will be approximate 0.34-0.37mm, depending on the height and geometry of the part.
Electrical Discharge Machine, EDM, from Oscarmax, S550.