When the bed/bench is lowered it stands 470mm high and when raised 845mm.
Smaller items such as hand mowers can easily be placed on the bench, large mowers may need ramps.
It took some effort to pull the engine on by myself but was very easy to raise using the foot pump. The brakes held well, obviously you would need to secured the engine to the bench to work on it.
The last photo shows some of the spare parts left over.
Possible future mods: perhaps attach a vice and put a cover over the hydraulic ram.