Hi mate, yeah the box is decent, no doubt about it.
It's an absolute monster when it comes to handling torque, shifts lovely and is brand new delivered to your door with on the shelf parts in the unlikely case you need anything.
Yeah, if you go onto the Grannas Racing website and send your enquirey, Joel will come back to you.
Something worth querying on your enquiry is the RHD fitment as SRD had to make some extra room in the trans tunnel on the swap they did for a customer.
I never had this issue on mine, but maybe the bell housing adaptor mould could have ran out over time. This is what Ash at SRD has theorised as he could see there was plenty of room on mine.