Just received and tested my SFX 37418 from Kernow, lovers model and the detail is perfect, fuel tanks look parallel to me.
The sound on the other hand is awful. Sounds like something the Red Box Manufacturer would do with Toy Town Sound. The horns are pathetic, being a short blip when the loco is stationary and similar to a Toy Town Sound chip when moving. The vibration seems to be from a plate between the 28mm speaker and the PCB. This should be sealed!
Ive programmed it and sat it on the track and without pressing anything the loco started up on its own and then refused to be quiet while being on the track, I’ve had this issue before, funnily enough on a Bachmann 158 also Zimo but never on an ESU decoder.