Just found it as you posted this - I had been looking at the Cavalex Class 60 thread, not the A/S one!
Looks like the Cavalex Class 60 body sits too low on the chassis, compared to the A/S and Hornby models. Needs to be lifted up maybe 2mm with some kind of bracing to match the others.
The Heljan Class 47 gets lumps kicked out of it for being too “tubby” and the Bachmann 47 for being crap inside for upgrades, having poor driving characteristics, and undesireable livery options.
Hopefully, Cavalex get the 47 right, avoiding all of these pitfalls.