More than expected , reply from Phil at Virtavia, that's OK , worth a try.
----- Original Message Follows -----
> Hi,
>
> thanks for your suggestion regarding the A-4.
> Unfortunately single-variant upgrades are not
> economically viable, we couldn't justify the work needed
> to do justice to the KAHU as it would take up resources
> and most likely would not be well received enough.
>
> Phil,
> Virtavia Support
>
> -----Original Message-----
> From: Ian Warren
> Sent: Thursday, April 27, 2017 9:37 AM
> To:
tech.support@virtavia.com> Subject: McDonnell Douglas A-4 Skyhawk
>
> Hi all involved with the Virtavia A-4 Skyhawk,
>
> Hi guys,
>
> Since your McDonnell Douglas A-4 Skyhawk was so well
> received and now the developers would refreshed after the
> build, it would brilliant to build maybe the 'KAHU'
> aircraft, the external modifications are very minimal
> using the non 'Hump' 'E' variant, many here in New Zealand
> wished for this last and most advanced version, having the
> author only around the corner from me he could put input
> in, the book - course on my shelf, and a meeting with Don
> and many off the interested regarding the aircraft.
>
http://www.willsonscott.biz/skyhawks-th ... af-skyhawk>
https://www.youtube.com/watch?v=F5sFmyxQSro> I guess with all the knowledge here and of course today
> these aircraft being used all over the world for mid-air
> ACM training I thought it would well worth to open the
> production lines again, keep it totally hush hush and see
> were we go.
>
> Regard and Cheers, Ian