I have two. a ts model with a villiers mk 15 four stroke engine.I prefer the four stroke as found the two strokes get tempremental when hot. Only problem I find is there is no adjustment to the handles and im tall so tend to stoop when using it. The second one I have was chris's on here which is a junior model. The blades only eighteen inches long, powered by a four stroke jap engine.
Nice machines but you know when you've used one. They shake your fillings out.