Hi Dave
The earlier Little John Lathes did have a big problem due to the trigger stopping mechanism sticking. This resulted in shear pins being broken, and hand traversing rack pinions having teeth sheared off, and other nasty incidents involving chucks and tooling. As a result, Raglan were heavily criticized by the users, which resulted in them redesigning the mechanism to be instantly positive. It was fitted to the Raglan 5inch Lathe, and has proven to be one of the best designs ever, and it has performed faultlessly for me.
Cheers David