I can see three options:
- A900, FS-1100, Skyport transmitter
- A900, FS-1100, Skyport transmitter (A900->Skyport Sync lead)
- A900, passive flash adaptor, Skyport transmitter (A900->Skyport Sync lead)
option cause a problem with two electrical connections.
For the passive connection I see SpeedGraphic have something (Code HA6976)