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
OP. I see you list the UK in your info........sadly, for you, all UK 2018+ come with the digital dash and there is no "base" car, unless you go for a pre-facelift model (2015-2017)
The guys at Modurstang are great and they actually offer a replacement oil cooler system (as do GT101, but they're based in Essex). Finger's crossed your engine is OK.
Two other highly recommended specialists are
Motorsport and Performance (Yorkshire)
https://www.motorsportandperformance.com/...
Also, if you're on Facebook, join Simply Mustangs UK. You'll get lots of very good advice and it's a very friendly group :)
https://www.facebook.com/groups/SimplyMustangsUK
Very likely to be your oil cooler........this is not uncommon on the RHD S550.
Are you still under warranty, because it could be a big job, in as much as this has wrecked some engines :(