411.
The RR letter is standard and I have only seen it issued ( On several occasions) BUT only have to kits have been ordered to at least show there is some intent to comply
To order the kit requires full payment to RR at $125,000 a copy.
Also the RR letter is only support the final approval has to come from the Airworthiness Authority
Of course I am sure that your people have done that
Oh silly me - not a problem !
Makes no difference.
We (in the USA) do, that's all that matters.
Full stop.
Recognise this from another site
You indicate that the FAA are the world Authority but they have never given dispensation for this
