well... I don't know much about the fine tuning of FDMs here.
HerbyW was working for about 4 months in his shuttle, when Thorsten thought that he was more qualified to do a better job. So he "took the project out of HerbyW's hand"
They seem unable to reach common grounds, so all I can wish, is for the best of both projects. And consider both are valid, acceptable and enjoyable.
In your position, Thorsten should step away, and respect that HerbyW was already working on the shuttle. So, what can we do?
Or accept that Thorsten can pull HerbyW away, because Thorsten has written priviledges on FGAddon, while HerbyW does not?
IH-COL