I went searching for the new playable diesel horns on MTH's site and also noticed that the sideframes on the GPs look more 3D than the old ones. The brake shoes appear to be set back towards the wheels more than before with better detailing. It's easiest to see with the silver colored ones on the SF model.
Anybody got an older one to compare?
I didn't want to clog up the other post with this.
