1.Render result: 90% sites are uneven. walls, floors and ceilings... 
Most pedal and leveler rendering machine, only suitable for straight wall, flat floor and ceiling.
2.Stability: 100% buyers don’t know how to repair machine. 
16 years market feedback shows that pedal hydraulic needs 600-1000 times trample a day, cause problem in a month!
3.Operation: 95.3% users are ordinary people not professional engineer. 
Market shows even after training, user still don’t know how to operate! 
All you need is a kind of plastering machine no limitation for both wall and users!