The bayonet holder with the Fujifilm GFX-100 bayonet is placed on longer distance from the optics to allow room for the increased body dimensions of the GFX-100 body.
Because of that there may be limitations with some optics. The Actar-60 is known not to focus at infinity anymore with this particular interface kit.
Alternatively the GFX-100 can be mounted to the existing ACMV-862 kit unchanged, although only in portrait mode without rotation to landscape.
Note: this adapter is already intergrated in the ACMV-F100 Kit