Tamiya Corsair Conversion???

[Artful69]

Hi all ...

For those that are Corsair experts here (John I'm eyeballing you!!) ... I'm wanting to convert a Tamiya Corsair into an F4U-1C (4x 20mm cannon) ... apparently the aircraft was developed in tandem with the F4U-1D - but that doesn't necessarily mean that the 2 aircraft share the same design throughout.

1. Is the 1D a better starting point than a 1A ?? and 

2. Is there an available conversion for the 1C anywhere?? ... and, if not ...

3. Are there any drawings or references for any differences to the version I'm converting (including wing/cannon etc)

Rog