The S550 V8 was always available with the manual here in Europe and the same will go for the S650, so I don't know why you think that isn't the case.
Here in the UK it was the Ecoboost that was dropped due to poor sales versus the V8, back in 2019.
Nice work Kristian! That's a great space you have there. For our American friends here, space like that is very uncommon in the UK as builders try to squeeze houses as close as possible to maximize their profits. The downside of a (relatively) small island!
My only fear of using paving slabs...
That's really nice. I have the Grabber Orange Mach 1 too, and a Lime Gold version.
As for the S550, the only Grabber Blue one to date is the GT500 from Maisto :)
Welcome to the forum!
Firstly, your best bet for a tune is MAP. They have lots of experiencing in tuning the S550.
https://www.motorsportandperformance.com/
Secondly, if you're on Facebook, come and join us at https://www.facebook.com/groups/SimplyMustangsUK