Well I e-mailed tech support at Lumicon - again - still awaiting reply and cc'd Steve at MyAstroshop who I bought all the gear off.
Steve suggested moving the focal reducer - I can't see that you can do that inside the OAG itself - anyone know different?
Then Steve suggested moving the DSLR - at about 2cm further out from the OAG coma is still very present but greatly reduced - almost bearable. Alot of effort to re-position camera, focus and then check for coma. Especial when Lumicon say pin point stars across the field of a 35mm DSLR...
Hoping Lumicon come back with something helpful soon!
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