This arrived today, a test report by the National Institute of Agricultural Engineering (NIAE) in the UK on a model J compact engine.
An interesting read, nearly 3 hours into a 24 hour running test the gearbox siezed due to a broken tooth and parts from another engine were used to repair it.
A further 16 hours later and the unit was stopped for excessive clutch slip.
The NIAE concluded that this unit is "not suitable for general farming use", so not exactly a thumbs up then !